Remove myself as maintainer of GFS2

I am retiring from Red Hat and will no longer be a maintainer of the
gfs2 file system.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: AstralBob

MAINTAINERS

@@ -8950,7 +8950,6 @@ S:	Maintained
 F:	scripts/get_maintainer.pl
 
 GFS2 FILE SYSTEM
-M:	Bob Peterson <rpeterso@redhat.com>
 M:	Andreas Gruenbacher <agruenba@redhat.com>
 L:	gfs2@lists.linux.dev
 S:	Supported