Remove unused editor.cc file and clean up related CMake and code files

src/app/editor/editor.cc

@@ -1,7 +0,0 @@
-#include "editor.h"
-
-namespace yaze {
-namespace editor {
-
-} // namespace editor
-} // namespace yaze

src/app/editor/editor.cmake

@@ -1,6 +1,5 @@
 set(
   YAZE_APP_EDITOR_SRC
-  app/editor/editor.cc
   app/editor/editor_manager.cc
   app/editor/dungeon/dungeon_editor.cc
   app/editor/overworld/overworld_editor.cc

src/app/editor/editor_manager.cc

@@ -433,13 +433,9 @@ void EditorManager::DrawHomepage() {
       "The editor is still in development, so please report any bugs or issues "
       "you encounter.");
 
-  static bool managed_startup = false;
-
   if (Button("Open ROM", ImVec2(200, 0))) {
     LoadRom();
   }
-  SameLine();
-  ImGui::Checkbox("Manage Startup", &managed_startup);
   Separator();
 
   settings_editor_.Update();