Revert "fix bugs"

This reverts commit d3061c8ac5.

DevNotice.md

@@ -1,6 +1,4 @@
 This is a notice file for all developers.
 I had finish the Command CircleBuffer.
 
-Now I finish the delete object undo/redo functionality.
-
-Fixed some bugs.
+Now I finish the delete object undo/redo functionality.