bash: Hide git-resolve, its deprecated.

Don't offer resolve as a possible subcommand completion.  If you
read the top of the script, there is a big warning about how it
will go away soon in the near future.  People should not be using it.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

contrib/completion/git-completion.bash

@@ -297,6 +297,7 @@ __git_commands ()
 		reflog)           : plumbing;;
 		repo-config)      : plumbing;;
 		rerere)           : plumbing;;
+		resolve)          : dead dont use;;
 		rev-list)         : plumbing;;
 		rev-parse)        : plumbing;;
 		runstatus)        : plumbing;;