Remove array_key_exists()

Author: Mitesh

features/theme-mod-list.feature

@@ -48,4 +48,4 @@ Feature: Manage WordPress theme mods list
       - 
         key: key_b
         value: value_b
-      """
+      """

src/Theme_Mod_Command.php

@@ -155,9 +155,8 @@ public function get( $args = array(), $assoc_args = array() ) {
 	 * @subcommand list
 	 */
 	public function list_( $args = array(), $assoc_args = array() ) {
-		if ( ! array_key_exists( 'all', $assoc_args ) ) {
-			$assoc_args['all'] = 1;
-		}
+
+		$assoc_args['all'] = 1;
 
 		$this->get( $args, $assoc_args );
 	}