diff --git a/src/common/progress_callback.cpp b/src/common/progress_callback.cpp
index 2d0b4b06a..eeeb94add 100644
--- a/src/common/progress_callback.cpp
+++ b/src/common/progress_callback.cpp
@@ -3,7 +3,6 @@
 
 #include "progress_callback.h"
 #include "assert.h"
-#include "byte_stream.h"
 #include "log.h"
 
 #include <cmath>
diff --git a/src/core/cheats.cpp b/src/core/cheats.cpp
index ec68caa32..9d9d99a47 100644
--- a/src/core/cheats.cpp
+++ b/src/core/cheats.cpp
@@ -1,19 +1,20 @@
-// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com> and contributors.
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com> and contributors.
 // SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
 
 #include "cheats.h"
 #include "bus.h"
-#include "common/assert.h"
-#include "common/byte_stream.h"
-#include "common/file_system.h"
-#include "common/log.h"
-#include "common/small_string.h"
-#include "common/string_util.h"
 #include "controller.h"
 #include "cpu_code_cache.h"
 #include "cpu_core.h"
 #include "host.h"
 #include "system.h"
+
+#include "common/assert.h"
+#include "common/file_system.h"
+#include "common/log.h"
+#include "common/small_string.h"
+#include "common/string_util.h"
+
 #include <cctype>
 #include <iomanip>
 #include <sstream>
diff --git a/src/core/fullscreen_ui.cpp b/src/core/fullscreen_ui.cpp
index 13732d1f3..3f54b0548 100644
--- a/src/core/fullscreen_ui.cpp
+++ b/src/core/fullscreen_ui.cpp
@@ -27,7 +27,6 @@
 #include "util/input_manager.h"
 #include "util/postprocessing.h"
 
-#include "common/byte_stream.h"
 #include "common/error.h"
 #include "common/file_system.h"
 #include "common/log.h"
diff --git a/src/core/game_database.cpp b/src/core/game_database.cpp
index f56c1149a..2f017b1d4 100644
--- a/src/core/game_database.cpp
+++ b/src/core/game_database.cpp
@@ -11,7 +11,6 @@
 
 #include "common/assert.h"
 #include "common/binary_reader_writer.h"
-#include "common/byte_stream.h"
 #include "common/error.h"
 #include "common/file_system.h"
 #include "common/heterogeneous_containers.h"
diff --git a/src/core/memory_card.cpp b/src/core/memory_card.cpp
index 85757f5db..73f7c4b9d 100644
--- a/src/core/memory_card.cpp
+++ b/src/core/memory_card.cpp
@@ -9,7 +9,6 @@
 #include "util/state_wrapper.h"
 
 #include "common/bitutils.h"
-#include "common/byte_stream.h"
 #include "common/error.h"
 #include "common/file_system.h"
 #include "common/log.h"
diff --git a/src/duckstation-qt/qthost.cpp b/src/duckstation-qt/qthost.cpp
index 2bf21f43d..0ab86f82a 100644
--- a/src/duckstation-qt/qthost.cpp
+++ b/src/duckstation-qt/qthost.cpp
@@ -25,7 +25,6 @@
 #include "core/system.h"
 
 #include "common/assert.h"
-#include "common/byte_stream.h"
 #include "common/crash_handler.h"
 #include "common/error.h"
 #include "common/file_system.h"
diff --git a/src/duckstation-qt/qtutils.cpp b/src/duckstation-qt/qtutils.cpp
index b1a609630..74df8b86f 100644
--- a/src/duckstation-qt/qtutils.cpp
+++ b/src/duckstation-qt/qtutils.cpp
@@ -6,7 +6,6 @@
 #include "core/game_list.h"
 #include "core/system.h"
 
-#include "common/byte_stream.h"
 #include "common/log.h"
 
 #include <QtCore/QCoreApplication>
@@ -146,27 +145,6 @@ void ResizeColumnsForTreeView(QTreeView* view, const std::initializer_list<int>&
   ResizeColumnsForView(view, widths);
 }
 
-QByteArray ReadStreamToQByteArray(ByteStream* stream, bool rewind /*= false*/)
-{
-  QByteArray ret;
-  const u64 old_pos = stream->GetPosition();
-  if (rewind && !stream->SeekAbsolute(0))
-    return {};
-
-  const u64 stream_size = stream->GetSize() - stream->GetPosition();
-  ret.resize(static_cast<int>(stream_size));
-  if (stream_size > 0 && !stream->Read2(ret.data(), static_cast<u32>(stream_size), nullptr))
-    return {};
-
-  stream->SeekAbsolute(old_pos);
-  return ret;
-}
-
-bool WriteQByteArrayToStream(QByteArray& arr, ByteStream* stream)
-{
-  return arr.isEmpty() || stream->Write2(arr.data(), static_cast<u32>(arr.size()));
-}
-
 void OpenURL(QWidget* parent, const QUrl& qurl)
 {
   if (!QDesktopServices::openUrl(qurl))
diff --git a/src/duckstation-qt/qtutils.h b/src/duckstation-qt/qtutils.h
index 79647aa2f..2b6bb16f6 100644
--- a/src/duckstation-qt/qtutils.h
+++ b/src/duckstation-qt/qtutils.h
@@ -77,12 +77,6 @@ void ResizeColumnsForTreeView(QTreeView* view, const std::initializer_list<int>&
 /// NOTE: Defined in QtKeyCodes.cpp, not QtUtils.cpp.
 u32 KeyEventToCode(const QKeyEvent* ev);
 
-/// Reads a whole stream to a Qt byte array.
-QByteArray ReadStreamToQByteArray(ByteStream* stream, bool rewind = false);
-
-/// Creates a stream from a Qt byte array.
-bool WriteQByteArrayToStream(QByteArray& arr, ByteStream* stream);
-
 /// Opens a URL with the default handler.
 void OpenURL(QWidget* parent, const QUrl& qurl);
 
diff --git a/src/util/image.cpp b/src/util/image.cpp
index 6200f2edf..336ea6ab8 100644
--- a/src/util/image.cpp
+++ b/src/util/image.cpp
@@ -4,7 +4,6 @@
 #include "image.h"
 
 #include "common/bitutils.h"
-#include "common/byte_stream.h"
 #include "common/fastjmp.h"
 #include "common/file_system.h"
 #include "common/log.h"