completion: bash: remove zsh wrapper

It has been deprecated for more than eight years now, it's never up to
date, and it's a hassle to maintain.

It's time to move on.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/completion/git-completion.bash

@@ -3458,96 +3458,8 @@ __gitk_main ()
 	__git_complete_revlist
 }
 
-if [[ -n ${ZSH_VERSION-} ]] &&
-   # Don't define these functions when sourced from 'git-completion.zsh',
-   # it has its own implementations.
-   [[ -z ${GIT_SOURCING_ZSH_COMPLETION-} ]]; then
-	echo "WARNING: this script is deprecated, please see git-completion.zsh" 1>&2
-
-	autoload -U +X compinit && compinit
-
-	__gitcomp ()
-	{
-		emulate -L zsh
-
-		local cur_="${3-$cur}"
-
-		case "$cur_" in
-		--*=)
-			;;
-		*)
-			local c IFS=$' \t\n'
-			local -a array
-			for c in ${=1}; do
-				c="$c${4-}"
-				case $c in
-				--*=*|*.) ;;
-				*) c="$c " ;;
-				esac
-				array[${#array[@]}+1]="$c"
-			done
-			compset -P '*[=:]'
-			compadd -Q -S '' -p "${2-}" -a -- array && _ret=0
-			;;
-		esac
-	}
-
-	__gitcomp_direct ()
-	{
-		emulate -L zsh
-
-		local IFS=$'\n'
-		compset -P '*[=:]'
-		compadd -Q -- ${${=1}% } && _ret=0
-	}
-
-	__gitcomp_nl ()
-	{
-		emulate -L zsh
-
-		local IFS=$'\n'
-		compset -P '*[=:]'
-		compadd -Q -S "${4- }" -p "${2-}" -- ${=1} && _ret=0
-	}
-
-	__gitcomp_nl_append ()
-	{
-		emulate -L zsh
-
-		local IFS=$'\n'
-		compadd -Q -S "${4- }" -p "${2-}" -- ${=1} && _ret=0
-	}
-
-	__gitcomp_file_direct ()
-	{
-		emulate -L zsh
-
-		local IFS=$'\n'
-		compset -P '*[=:]'
-		compadd -f -- ${=1} && _ret=0
-	}
-
-	__gitcomp_file ()
-	{
-		emulate -L zsh
-
-		local IFS=$'\n'
-		compset -P '*[=:]'
-		compadd -p "${2-}" -f -- ${=1} && _ret=0
-	}
-
-	_git ()
-	{
-		local _ret=1 cur cword prev
-		cur=${words[CURRENT]}
-		prev=${words[CURRENT-1]}
-		let cword=CURRENT-1
-		emulate ksh -c __${service}_main
-		let _ret && _default && _ret=0
-		return _ret
-	}
-
-	compdef _git git gitk
+if [[ -n ${ZSH_VERSION-} && -z ${GIT_SOURCING_ZSH_COMPLETION-} ]]; then
+	echo "ERROR: this script is obsolete, please see git-completion.zsh" 1>&2
 	return
 fi