Revert "fix(preview): close PILImage object once done"

This reverts commit a522bd3.

Author: NSPC911

src/rovr/core/preview_container.py

@@ -277,7 +277,6 @@ async def show_image_preview(self) -> None:
                     await self.remove_children()
                     await self.show_image_preview()
                 return
-        pil_object.close()
 
         if should_cancel():
             return