Remove CleanupUnusedTextures method from Editor and OverworldEditor classes; eliminate unused texture cleanup logic from EditorManager to streamline performance.

src/app/editor/overworld/overworld_editor.cc

@@ -1458,12 +1458,5 @@ absl::Status OverworldEditor::Clear() {
   return absl::OkStatus();
 }
 
-void OverworldEditor::CleanupUnusedTextures(uint64_t current_time,
-                                            uint64_t timeout) {
-  for (auto &bmp : maps_bmp_) {
-    bmp.CleanupUnusedTexture(current_time, timeout);
-  }
-}
-
 }  // namespace editor
 }  // namespace yaze

src/app/editor/overworld/overworld_editor.h

@@ -91,8 +91,6 @@ class OverworldEditor : public Editor, public gfx::GfxContext {
   absl::Status Save() override;
   absl::Status Clear() override;
 
-  void CleanupUnusedTextures(uint64_t current_time, uint64_t timeout) override;
-
   int jump_to_tab() { return jump_to_tab_; }
   int jump_to_tab_ = -1;
 
@@ -215,12 +213,8 @@ class OverworldEditor : public Editor, public gfx::GfxContext {
   bool middle_mouse_dragging_ = false;
   bool is_dragging_entity_ = false;
 
-  std::vector<uint8_t> selected_tile_data_;
   gfx::Tilemap tile16_blockset_;
 
-  std::vector<std::vector<uint8_t>> tile8_individual_data_;
-  std::vector<gfx::Bitmap> tile8_individual_;
-
   Rom* rom_;
 
   Tile16Editor tile16_editor_{&tile16_blockset_};