Code Quality: Remove unused variable in WP_Block_Patterns_Registry.

Follow-up to [56805], [59101].

Props Soean, mukesh27.
See #64898.

git-svn-id: https://develop.svn.wordpress.org/trunk@62201 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/class-wp-block-patterns-registry.php

@@ -227,10 +227,9 @@ public function get_registered( $pattern_name ) {
 	 *                 and per style.
 	 */
 	public function get_all_registered( $outside_init_only = false ) {
-		$patterns      = $outside_init_only
-				? $this->registered_patterns_outside_init
-				: $this->registered_patterns;
-		$hooked_blocks = get_hooked_blocks();
+		$patterns = $outside_init_only
+			? $this->registered_patterns_outside_init
+			: $this->registered_patterns;
 
 		foreach ( $patterns as $index => $pattern ) {
 			$content                       = $this->get_content( $pattern['name'], $outside_init_only );