wp-includes/block-template.php:519Unregister a block template.
$template_namestringWP_Block_Template|WP_Errorfunction unregister_block_template( $template_name ) { return WP_Block_Templates_Registry::get_instance()->unregister( $template_name );}Introduced in 6.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/block-template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.