wp-includes/class-wp-block-pattern-categories-registry.php:87Unregisters a pattern category.
$category_namestringbool public function unregister( $category_name ) { if ( ! $this->is_registered( $category_name ) ) { _doing_it_wrong( __METHOD__, /* translators: %s: Block pattern name. */ sprintf( __( 'Block pattern category "%s" not found.' ), $category_name ), '5.5.0' ); return false; } unset( $this->registered_categories[ $category_name ] ); unset( $this->registered_categories_outside_init[ $category_name ] ); return true; }Introduced in 5.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-block-pattern-categories-registry.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.