Remove unused includes and clean up header files

src/app/editor/system/popup_manager.cc

@@ -1,7 +1,5 @@
 #include "popup_manager.h"
 
-#include "imgui/imgui.h"
-
 namespace yaze {
 namespace editor {
 
@@ -11,8 +9,5 @@ PopupManager::PopupManager() {
 PopupManager::~PopupManager() {
 }
 
-
-
 } // namespace editor
-
 } // namespace yaze

src/app/editor/system/popup_manager.h

@@ -14,7 +14,6 @@ class PopupManager {
 };
 
 } // namespace editor
-
 } // namespace yaze
 
 #endif // YAZE_APP_EDITOR_POPUP_MANAGER_H