doc: move git-cherry to plumbing

Also remove git-cherry from Bash completion because plumbing
commands do not belong there.

Signed-off-by: Daniels Umanovskis <daniels@umanovskis.se>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: umanovskis

command-list.txt

@@ -62,7 +62,7 @@ git-check-mailmap                       purehelpers
 git-checkout                            mainporcelain           history
 git-checkout-index                      plumbingmanipulators
 git-check-ref-format                    purehelpers
-git-cherry                              ancillaryinterrogators          complete
+git-cherry                              plumbinginterrogators          complete
 git-cherry-pick                         mainporcelain
 git-citool                              mainporcelain
 git-clean                               mainporcelain

contrib/completion/git-completion.bash

@@ -1340,17 +1340,6 @@ _git_checkout ()
 	esac
 }
 
-_git_cherry ()
-{
-	case "$cur" in
-	--*)
-		__gitcomp_builtin cherry
-		return
-	esac
-
-	__git_complete_refs
-}
-
 __git_cherry_pick_inprogress_options="--continue --quit --abort"
 
 _git_cherry_pick ()