diff --git a/crates/haku/src/render.rs b/crates/haku/src/render.rs
index 1ba1a21..623e0da 100644
--- a/crates/haku/src/render.rs
+++ b/crates/haku/src/render.rs
@@ -1,6 +1,6 @@
 use alloc::vec::Vec;
 use tiny_skia::{
-    BlendMode, Color, FillRule, LineCap, Paint, Path, PathBuilder, Pixmap, Rect, Shader,
+    BlendMode, Color, FillRule, LineCap, Paint, Path, PathBuilder, Pixmap, Shader,
     Stroke as SStroke, Transform,
 };
 
diff --git a/crates/rkgk/src/api/wall.rs b/crates/rkgk/src/api/wall.rs
index 0a2f5da..35004fa 100644
--- a/crates/rkgk/src/api/wall.rs
+++ b/crates/rkgk/src/api/wall.rs
@@ -19,10 +19,9 @@ use schema::{
 use serde::{Deserialize, Serialize};
 use tokio::{
     select,
-    sync::{self, mpsc, oneshot},
-    time::Instant,
+    sync::{mpsc, oneshot},
 };
-use tracing::{error, info, instrument};
+use tracing::{error, instrument};
 
 use crate::{
     haku::{Haku, Limits},
@@ -254,8 +253,7 @@ impl SessionLoop {
             .name(String::from("haku render thread"))
             .spawn({
                 let wall = Arc::clone(&wall);
-                let chunk_images = Arc::clone(&chunk_images);
-                move || Self::render_thread(wall, chunk_images, limits, render_commands_rx)
+                move || Self::render_thread(wall, limits, render_commands_rx)
             })
             .context("could not spawn render thread")?;
 
@@ -415,12 +413,7 @@ impl SessionLoop {
         Ok(())
     }
 
-    fn render_thread(
-        wall: Arc<Wall>,
-        chunk_images: Arc<ChunkImages>,
-        limits: Limits,
-        mut commands: mpsc::Receiver<RenderCommand>,
-    ) {
+    fn render_thread(wall: Arc<Wall>, limits: Limits, mut commands: mpsc::Receiver<RenderCommand>) {
         let mut haku = Haku::new(limits);
         let mut brush_ok = false;
 
@@ -436,7 +429,7 @@ impl SessionLoop {
                             for point in points {
                                 // Ignore the result. It's better if we render _something_ rather
                                 // than nothing.
-                                _ = draw_to_chunks(&wall, &chunk_images, &haku, value, point);
+                                _ = draw_to_chunks(&wall, &haku, value, point);
                             }
                             haku.reset_vm();
                         }
@@ -467,14 +460,8 @@ fn chunks_to_modify(wall: &Wall, points: &[Vec2]) -> HashSet<ChunkPosition> {
     chunks
 }
 
-#[instrument(skip(wall, chunk_images, haku, value))]
-fn draw_to_chunks(
-    wall: &Wall,
-    chunk_images: &ChunkImages,
-    haku: &Haku,
-    value: Value,
-    center: Vec2,
-) -> eyre::Result<()> {
+#[instrument(skip(wall, haku, value))]
+fn draw_to_chunks(wall: &Wall, haku: &Haku, value: Value, center: Vec2) -> eyre::Result<()> {
     let settings = wall.settings();
 
     let chunk_size = settings.chunk_size as f32;
@@ -497,16 +484,5 @@ fn draw_to_chunks(
         }
     }
 
-    // NOTE: Maybe sending in an iterator would be more efficient?
-    // If there were many chunks modified, (which there probably weren't,) this could allocate
-    // a lot of memory.
-    chunk_images.mark_modified_blocking(
-        (top_chunk..bottom_chunk)
-            .flat_map(|chunk_y| {
-                (left_chunk..right_chunk).map(move |chunk_x| ChunkPosition::new(chunk_x, chunk_y))
-            })
-            .collect(),
-    );
-
     Ok(())
 }
diff --git a/crates/rkgk/src/login/database.rs b/crates/rkgk/src/login/database.rs
index e588777..d51a097 100644
--- a/crates/rkgk/src/login/database.rs
+++ b/crates/rkgk/src/login/database.rs
@@ -1,7 +1,7 @@
 use std::path::PathBuf;
 
 use argon2::{
-    password_hash::{PasswordHasher, Salt, SaltString},
+    password_hash::{PasswordHasher, SaltString},
     Argon2, PasswordHash, PasswordVerifier,
 };
 use base64::Engine;
diff --git a/crates/rkgk/src/main.rs b/crates/rkgk/src/main.rs
index aea8e11..b322b18 100644
--- a/crates/rkgk/src/main.rs
+++ b/crates/rkgk/src/main.rs
@@ -13,10 +13,8 @@ use eyre::Context;
 use tokio::{fs, net::TcpListener};
 use tower_http::services::{ServeDir, ServeFile};
 use tracing::{info, info_span};
-use tracing_subscriber::fmt::format::FmtSpan;
 
 mod api;
-mod binary;
 mod config;
 mod haku;
 mod id;
diff --git a/crates/rkgk/src/wall/auto_save.rs b/crates/rkgk/src/wall/auto_save.rs
index ebda9b4..e6fba3f 100644
--- a/crates/rkgk/src/wall/auto_save.rs
+++ b/crates/rkgk/src/wall/auto_save.rs
@@ -1,14 +1,13 @@
-use std::{backtrace::Backtrace, collections::HashSet, sync::Arc, time::Duration};
+use std::{collections::HashSet, sync::Arc, time::Duration};
 
-use dashmap::DashSet;
 use serde::{Deserialize, Serialize};
 use tokio::{
     sync::mpsc,
     time::{interval, MissedTickBehavior},
 };
-use tracing::{info, instrument};
+use tracing::instrument;
 
-use super::{chunk_images::ChunkImages, ChunkPosition, Database, Wall};
+use super::{chunk_images::ChunkImages, ChunkPosition};
 
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct Settings {
diff --git a/crates/rkgk/src/wall/chunk_images.rs b/crates/rkgk/src/wall/chunk_images.rs
index 40f1210..de76835 100644
--- a/crates/rkgk/src/wall/chunk_images.rs
+++ b/crates/rkgk/src/wall/chunk_images.rs
@@ -26,10 +26,6 @@ enum Command {
         chunks: Vec<ChunkPosition>,
         reply: oneshot::Sender<eyre::Result<()>>,
     },
-
-    MarkModified {
-        chunks: Vec<ChunkPosition>,
-    },
 }
 
 impl ChunkImages {
@@ -69,12 +65,6 @@ impl ChunkImages {
         rx.await.context("failed to load chunks")?
     }
 
-    pub fn mark_modified_blocking(&self, chunks: Vec<ChunkPosition>) {
-        _ = self
-            .commands_tx
-            .blocking_send(Command::MarkModified { chunks });
-    }
-
     pub fn chunk_exists(&self, position: ChunkPosition) -> bool {
         self.wall.has_chunk(position) || self.async_loop.chunks_in_db.contains(&position)
     }
@@ -221,17 +211,12 @@ impl ChunkImageLoop {
         while let Some(command) = commands_rx.recv().await {
             match command {
                 Command::Encode { chunks, reply } => {
-                    // TODO: This should have a caching layer.
                     tokio::spawn(Arc::clone(&self).encode(chunks, reply));
                 }
 
                 Command::Load { chunks, reply } => {
                     tokio::spawn(Arc::clone(&self).load(chunks, reply));
                 }
-
-                Command::MarkModified { chunks } => {
-                    // TODO: This should invalidate data from the caching layer.
-                }
             }
         }
     }
diff --git a/crates/rkgk/src/wall/chunk_iterator.rs b/crates/rkgk/src/wall/chunk_iterator.rs
index 9f4144e..63db6f2 100644
--- a/crates/rkgk/src/wall/chunk_iterator.rs
+++ b/crates/rkgk/src/wall/chunk_iterator.rs
@@ -1,5 +1,3 @@
-use std::iter::Take;
-
 use super::ChunkPosition;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -19,26 +17,6 @@ impl ChunkIterator {
             bottom_right,
         }
     }
-
-    pub fn take_next(&mut self, n: i32) -> Take<Self> {
-        assert!(n > 0);
-
-        let take = (*self).take(n as usize);
-
-        let x = self.cursor.x - self.left;
-        let width = self.bottom_right.x - self.left;
-        if width != 0 {
-            self.cursor.x = self.left + (x + n) % width;
-            self.cursor.y += n / width;
-        } else {
-            // In a width = 0 configuration, we iterate vertically.
-            // This is probably not the right thing to do, but we're just doing this to guard
-            // against malicious clients.
-            self.cursor.y += n;
-        }
-
-        take
-    }
 }
 
 impl Iterator for ChunkIterator {
diff --git a/crates/rkgk/src/wall/database.rs b/crates/rkgk/src/wall/database.rs
index 56a168c..ee7a650 100644
--- a/crates/rkgk/src/wall/database.rs
+++ b/crates/rkgk/src/wall/database.rs
@@ -1,17 +1,10 @@
-use std::{
-    convert::identity,
-    path::{Path, PathBuf},
-    sync::Arc,
-};
+use std::{convert::identity, path::PathBuf, sync::Arc};
 
-use chrono::Utc;
 use eyre::Context;
 use rusqlite::Connection;
 use tokio::sync::{mpsc, oneshot};
 use tracing::{error, info, instrument};
 
-use crate::login::UserId;
-
 use super::{ChunkPosition, WallId};
 
 pub struct Settings {
@@ -32,18 +25,12 @@ pub struct ChunkDataPair {
 }
 
 enum Command {
-    SetWallInfo {
-        created_by: UserId,
-        title: String,
-        reply: oneshot::Sender<eyre::Result<()>>,
-    },
-
-    WriteChunks {
+    Write {
         chunks: Vec<ChunkDataPair>,
         reply: oneshot::Sender<eyre::Result<()>>,
     },
 
-    ReadChunks {
+    Read {
         chunks: Vec<ChunkPosition>,
         reply: oneshot::Sender<Vec<ChunkDataPair>>,
     },
@@ -62,7 +49,7 @@ impl Database {
     pub async fn write_chunks(&self, chunks: Vec<ChunkDataPair>) -> eyre::Result<()> {
         let (tx, rx) = oneshot::channel();
         self.command_tx
-            .send(Command::WriteChunks { chunks, reply: tx })
+            .send(Command::Write { chunks, reply: tx })
             .await
             .context("database is offline")?;
         rx.await.context("database returned an error")?
@@ -74,7 +61,7 @@ impl Database {
     ) -> eyre::Result<Vec<ChunkDataPair>> {
         let (tx, rx) = oneshot::channel();
         self.command_tx
-            .send(Command::ReadChunks { chunks, reply: tx })
+            .send(Command::Read { chunks, reply: tx })
             .await
             .context("database is offline")?;
         rx.await.context("database did not return anything")
@@ -207,17 +194,6 @@ pub fn start(settings: Settings) -> eyre::Result<Database> {
     std::thread::Builder::new()
         .name(format!("database thread {}", settings.wall_id))
         .spawn(move || {
-            let mut s_set_wall_info = db
-                .prepare(
-                    r#"
-                        INSERT OR REPLACE
-                        INTO t_wall_info
-                        (created_by, title)
-                        VALUES (?, ?);
-                    "#,
-                )
-                .unwrap();
-
             let mut s_write_chunk = db
                 .prepare(
                     r#"
@@ -250,20 +226,7 @@ pub fn start(settings: Settings) -> eyre::Result<Database> {
 
             while let Some(command) = command_rx.blocking_recv() {
                 match command {
-                    Command::SetWallInfo {
-                        created_by,
-                        title,
-                        reply,
-                    } => {
-                        _ = reply.send(
-                            s_set_wall_info
-                                .execute((created_by.0, title))
-                                .map(|_| ())
-                                .context("failed to set wall info"),
-                        );
-                    }
-
-                    Command::WriteChunks { chunks, reply } => {
+                    Command::Write { chunks, reply } => {
                         let mut result = Ok(());
                         for ChunkDataPair { position, data } in chunks {
                             if let Err(error) =
@@ -279,7 +242,7 @@ pub fn start(settings: Settings) -> eyre::Result<Database> {
                         ));
                     }
 
-                    Command::ReadChunks { chunks, reply } => {
+                    Command::Read { chunks, reply } => {
                         let result = chunks
                             .into_iter()
                             .flat_map(|position| {