How to Hide Styles Library Admin Menus

function plt_hide_styles_library_menus() {
	//Hide "Styles Library".
	remove_menu_page('edit.php?post_type=ea_block_pattern');
	//Hide "Styles Library → All Patterns".
	remove_submenu_page('edit.php?post_type=ea_block_pattern', 'edit.php?post_type=ea_block_pattern');
	//Hide "Styles Library → Add New Pattern".
	remove_submenu_page('edit.php?post_type=ea_block_pattern', 'post-new.php?post_type=ea_block_pattern');
	//Hide "Styles Library → Categories".
	remove_submenu_page('edit.php?post_type=ea_block_pattern', 'edit-tags.php?taxonomy=pattern-category&post_type=ea_block_pattern');
	//Hide "Styles Library → Keywords".
	remove_submenu_page('edit.php?post_type=ea_block_pattern', 'edit-tags.php?taxonomy=pattern-keyword&post_type=ea_block_pattern');
}

add_action('admin_menu', 'plt_hide_styles_library_menus', 15);

Where do I put this code?