Fix != comparison for gdicmn classes.  Fixes #15772

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@75873 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Remove more CVS $Id$ and $Revision$ tags, and a bit of code that uses them.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@75874 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775