REST API: Remove a few unused variables in foreach loops.

Follow-up to [38832], [48173], [49132], [49925].

Props antonvlasenko.
See #61593.

git-svn-id: https://develop.svn.wordpress.org/trunk@58694 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php

@@ -1207,7 +1207,7 @@ public static function get_filename_from_disposition( $disposition_header ) {
 				continue;
 			}
 
-			list( $type, $attr_parts ) = explode( ';', $value, 2 );
+			list( , $attr_parts ) = explode( ';', $value, 2 );
 
 			$attr_parts = explode( ';', $attr_parts );
 			$attributes = array();

src/wp-includes/rest-api/endpoints/class-wp-rest-block-types-controller.php

@@ -141,7 +141,7 @@ public function get_items( $request ) {
 			$namespace = $request['namespace'];
 		}
 
-		foreach ( $block_types as $slug => $obj ) {
+		foreach ( $block_types as $obj ) {
 			if ( $namespace ) {
 				list ( $block_namespace ) = explode( '/', $obj->name );
 

src/wp-includes/rest-api/endpoints/class-wp-rest-post-statuses-controller.php

@@ -113,7 +113,7 @@ public function get_items( $request ) {
 		$statuses          = get_post_stati( array( 'internal' => false ), 'object' );
 		$statuses['trash'] = get_post_status_object( 'trash' );
 
-		foreach ( $statuses as $slug => $obj ) {
+		foreach ( $statuses as $obj ) {
 			$ret = $this->check_read_permission( $obj );
 
 			if ( ! $ret ) {

src/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php

@@ -201,7 +201,7 @@ public function get_items( $request ) {
 		$current_theme = wp_get_theme();
 		$status        = $request['status'];
 
-		foreach ( $active_themes as $theme_name => $theme ) {
+		foreach ( $active_themes as $theme ) {
 			$theme_status = ( $this->is_same_theme( $theme, $current_theme ) ) ? 'active' : 'inactive';
 			if ( is_array( $status ) && ! in_array( $theme_status, $status, true ) ) {
 				continue;

src/wp-includes/rest-api/search/class-wp-rest-post-format-search-handler.php

@@ -61,7 +61,7 @@ public function search_items( WP_REST_Request $request ) {
 		$query_args = apply_filters( 'rest_post_format_search_query', $query_args, $request );
 
 		$found_ids = array();
-		foreach ( $format_slugs as $index => $format_slug ) {
+		foreach ( $format_slugs as $format_slug ) {
 			if ( ! empty( $query_args['search'] ) ) {
 				$format_string       = get_post_format_string( $format_slug );
 				$format_slug_match   = stripos( $format_slug, $query_args['search'] ) !== false;