Remove all lines containing cvs/svn "$Id$" keyword.

This keyword is not expanded by Git which means it's not replaced with the
correct revision value in the releases made using git-based scripts and it's
confusing to have lines with unexpanded "$Id$" in the released files. As
expanding them with Git is not that simple (it could be done with git archive
and export-subst attribute) and there are not many benefits in having them in
the first place, just remove all these lines.

If nothing else, this will make an eventual transition to Git simpler.

Closes #14487.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74602 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/private/grid.h

@@ -4,7 +4,6 @@
 // Author:      Michael Bedward (based on code by Julian Smart, Robin Dunn)
 // Modified by: Santiago Palacios
 // Created:     1/08/1999
-// RCS-ID:      $Id$
 // Copyright:   (c) Michael Bedward
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////

include/wx/generic/private/listctrl.h

@@ -3,7 +3,6 @@
 // Purpose:     private definitions of wxListCtrl helpers
 // Author:      Robert Roebling
 //              Vadim Zeitlin (virtual list control support)
-// Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////

include/wx/generic/private/markuptext.h

@@ -3,7 +3,6 @@
 // Purpose:     Generic wxMarkupText class for managing text with markup.
 // Author:      Vadim Zeitlin
 // Created:     2011-02-21
-// RCS-ID:      $Id: wxhead.h,v 1.12 2010-04-22 12:44:51 zeitlin Exp $
 // Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////

include/wx/generic/private/richtooltip.h

@@ -3,7 +3,6 @@
 // Purpose:     wxRichToolTipGenericImpl declaration.
 // Author:      Vadim Zeitlin
 // Created:     2011-10-18
-// RCS-ID:      $Id$
 // Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////

include/wx/generic/private/textmeasure.h

@@ -3,7 +3,6 @@
 // Purpose:     Generic wxTextMeasure declaration.
 // Author:      Vadim Zeitlin
 // Created:     2012-10-17
-// RCS-ID:      $Id$
 // Copyright:   (c) 1997-2012 wxWidgets team
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////

include/wx/generic/private/timer.h

@@ -2,7 +2,6 @@
 // Name:        wx/generic/private/timer.h
 // Purpose:     Generic implementation of wxTimer class
 // Author:      Vaclav Slavik
-// Id:          $Id$
 // Copyright:   (c) Vaclav Slavik
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////