How to Hide LabelGrid Tools Admin Menus

function plt_hide_label_grid_tools_menus() {
	//Hide "Releases".
	remove_menu_page('edit.php?post_type=release');
	//Hide "Releases → All Releases".
	remove_submenu_page('edit.php?post_type=release', 'edit.php?post_type=release');
	//Hide "Releases → Add New Release".
	remove_submenu_page('edit.php?post_type=release', 'post-new.php?post_type=release');
	//Hide "Releases → Release Tags".
	remove_submenu_page('edit.php?post_type=release', 'edit-tags.php?taxonomy=release_tag&post_type=release');
	//Hide "Releases → Record Labels".
	remove_submenu_page('edit.php?post_type=release', 'edit-tags.php?taxonomy=record_label&post_type=release');
	//Hide "Releases → Genres".
	remove_submenu_page('edit.php?post_type=release', 'edit-tags.php?taxonomy=genre&post_type=release');

	//Hide "Artist".
	remove_menu_page('edit.php?post_type=artist');
	//Hide "Artist → All Artists".
	remove_submenu_page('edit.php?post_type=artist', 'edit.php?post_type=artist');
	//Hide "Artist → Add New Artist".
	remove_submenu_page('edit.php?post_type=artist', 'post-new.php?post_type=artist');
	//Hide "Artist → Artists Tags".
	remove_submenu_page('edit.php?post_type=artist', 'edit-tags.php?taxonomy=artist_tag&post_type=artist');
	//Hide "Artist → Categories".
	remove_submenu_page('edit.php?post_type=artist', 'edit-tags.php?taxonomy=artist_category&post_type=artist');

	//Hide "LabelGrid Tools".
	remove_menu_page('labelgrid-tools');
	//Hide "LabelGrid Tools → General Settings".
	remove_submenu_page('labelgrid-tools', 'labelgrid-tools');
	//Hide "LabelGrid Tools → Sync content".
	remove_submenu_page('labelgrid-tools', 'labelgrid-tools-sync');
	//Hide "LabelGrid Tools → System Logs".
	remove_submenu_page('labelgrid-tools', 'labelgrid-tools-system-logs');
	//Hide "LabelGrid Tools → Gate Entries".
	remove_submenu_page('labelgrid-tools', 'labelgrid-tools-gate-entries');
}

add_action('admin_menu', 'plt_hide_label_grid_tools_menus', 11);
Where do I put this code?