Always enable experimental features in bash completion

This amends docker#2774 for bash completion.

Signed-off-by: Harald Albers <github@albersweb.de>

contrib/completion/bash/docker

@@ -602,19 +602,11 @@ __docker_append_to_completions() {
 # The result is cached for the duration of one invocation of bash completion.
 __docker_fetch_info() {
 	if [ -z "$info_fetched" ] ; then
-		read -r client_experimental server_experimental server_os <<< "$(__docker_q version -f '{{.Client.Experimental}} {{.Server.Experimental}} {{.Server.Os}}')"
+		read -r server_experimental server_os <<< "$(__docker_q version -f '{{.Server.Experimental}} {{.Server.Os}}')"
 		info_fetched=true
 	fi
 }
 
-# __docker_client_is_experimental tests whether the Docker cli is configured to support
-# experimental features. If so, the function exits with 0 (true).
-# Otherwise, or if the result cannot be determined, the exit value is 1 (false).
-__docker_client_is_experimental() {
-	__docker_fetch_info
-	[ "$client_experimental" = "true" ]
-}
-
 # __docker_server_is_experimental tests whether the currently configured Docker
 # server runs in experimental mode. If so, the function exits with 0 (true).
 # Otherwise, or if the result cannot be determined, the exit value is 1 (false).
@@ -1225,7 +1217,6 @@ _docker_docker() {
 		*)
 			local counter=$( __docker_pos_first_nonflag "$(__docker_to_extglob "$global_options_with_args")" )
 			if [ "$cword" -eq "$counter" ]; then
-				__docker_client_is_experimental && commands+=(${experimental_client_commands[*]})
 				__docker_server_is_experimental && commands+=(${experimental_server_commands[*]})
 				COMPREPLY=( $( compgen -W "${commands[*]} help" -- "$cur" ) )
 			fi
@@ -5492,6 +5483,7 @@ _docker() {
 		container
 		context
 		image
+		manifest
 		network
 		node
 		plugin
@@ -5550,10 +5542,6 @@ _docker() {
 		wait
 	)
 
-	local experimental_client_commands=(
-		manifest
-	)
-
 	local experimental_server_commands=(
 		checkpoint
 	)
@@ -5581,7 +5569,7 @@ _docker() {
 	# variables to cache server info, populated on demand for performance reasons
 	local info_fetched server_experimental server_os
 	# variables to cache client info, populated on demand for performance reasons
-	local client_experimental stack_orchestrator_is_kubernetes stack_orchestrator_is_swarm
+	local stack_orchestrator_is_kubernetes stack_orchestrator_is_swarm
 
 	local host config context