diff --git a/src/openrct2/drawing/Drawing.cpp b/src/openrct2/drawing/Drawing.cpp
index d659a28cf5..0d331068a9 100644
--- a/src/openrct2/drawing/Drawing.cpp
+++ b/src/openrct2/drawing/Drawing.cpp
@@ -577,11 +577,6 @@ void mask_init()
     }
 }
 
-void gfx_draw_pixel(rct_drawpixelinfo* dpi, const ScreenCoordsXY& coords, int32_t colour)
-{
-    gfx_fill_rect(dpi, { coords, coords }, colour);
-}
-
 void gfx_filter_pixel(rct_drawpixelinfo* dpi, const ScreenCoordsXY& coords, FilterPaletteID palette)
 {
     gfx_filter_rect(dpi, { coords, coords }, palette);
diff --git a/src/openrct2/drawing/Drawing.h b/src/openrct2/drawing/Drawing.h
index 453b641d19..8143c7f65d 100644
--- a/src/openrct2/drawing/Drawing.h
+++ b/src/openrct2/drawing/Drawing.h
@@ -665,13 +665,9 @@ extern int32_t gPickupPeepY;
 
 extern bool gTinyFontAntiAliased;
 
-extern rct_drawpixelinfo gScreenDPI;
-extern rct_drawpixelinfo gWindowDPI;
-
 bool clip_drawpixelinfo(
     rct_drawpixelinfo* dst, rct_drawpixelinfo* src, const ScreenCoordsXY& coords, int32_t width, int32_t height);
 void gfx_set_dirty_blocks(const ScreenRect& rect);
-void gfx_draw_all_dirty_blocks();
 void gfx_invalidate_screen();
 
 // palette
@@ -680,7 +676,6 @@ void load_palette();
 
 // other
 void gfx_clear(rct_drawpixelinfo* dpi, uint8_t paletteIndex);
-void gfx_draw_pixel(rct_drawpixelinfo* dpi, const ScreenCoordsXY& coords, int32_t colour);
 void gfx_filter_pixel(rct_drawpixelinfo* dpi, const ScreenCoordsXY& coords, FilterPaletteID palette);
 void gfx_invalidate_pickedup_peep();
 void gfx_draw_pickedup_peep(rct_drawpixelinfo* dpi);
diff --git a/src/openrct2/drawing/NewDrawing.cpp b/src/openrct2/drawing/NewDrawing.cpp
index d39353f339..08258379ec 100644
--- a/src/openrct2/drawing/NewDrawing.cpp
+++ b/src/openrct2/drawing/NewDrawing.cpp
@@ -167,10 +167,6 @@ void gfx_set_dirty_blocks(const ScreenRect& rect)
     }
 }
 
-void gfx_draw_all_dirty_blocks()
-{
-}
-
 void gfx_clear(rct_drawpixelinfo* dpi, uint8_t paletteIndex)
 {
     auto drawingEngine = dpi->DrawingEngine;
diff --git a/src/openrct2/interface/Window.cpp b/src/openrct2/interface/Window.cpp
index 68011d89cf..dc44f90544 100644
--- a/src/openrct2/interface/Window.cpp
+++ b/src/openrct2/interface/Window.cpp
@@ -130,9 +130,7 @@ void window_update_all_viewports()
  */
 void window_update_all()
 {
-    // gfx_draw_all_dirty_blocks();
     // window_update_all_viewports();
-    // gfx_draw_all_dirty_blocks();
 
     // 1000 tick update
     gWindowUpdateTicks += gCurrentDeltaTime;
diff --git a/src/openrct2/platform/platform.h b/src/openrct2/platform/platform.h
index b1d718606c..e0fb88d3fe 100644
--- a/src/openrct2/platform/platform.h
+++ b/src/openrct2/platform/platform.h
@@ -21,7 +21,6 @@
 #endif // __ANDROID__
 
 struct TTFFontDescriptor;
-struct rct2_install_info;
 
 #ifndef MAX_PATH
 #    define MAX_PATH 260
diff --git a/src/openrct2/rct2/RCT2.h b/src/openrct2/rct2/RCT2.h
index 37007e1f45..c8786193c9 100644
--- a/src/openrct2/rct2/RCT2.h
+++ b/src/openrct2/rct2/RCT2.h
@@ -88,17 +88,6 @@ constexpr const int32_t rct2_object_entry_group_counts[] = {
 };
 // clang-format on
 
-struct rct2_install_info
-{
-    uint32_t installLevel;
-    char title[260];
-    char path[260];
-    uint32_t var_20C;
-    uint8_t pad_210[256];
-    char expansionPackNames[16][128];
-    uint32_t activeExpansionPacks; // 0xB10
-};
-
 #pragma pack(push, 1)
 
 /**