Cleanup: remove redundant headers in source/blender/editors/

Remove redundant headers using
`./source/tools/utils_maintenance/code_clean.py`

Reviewed By: jmonteath

Ref D10364

source/blender/editors/space_statusbar/space_statusbar.c

@@ -34,7 +34,6 @@
 #include "RNA_access.h"
 
 #include "UI_interface.h"
-#include "UI_view2d.h"
 
 #include "WM_api.h"
 #include "WM_message.h"