Tips on Customizing Gtbabel

How to Hide Gtbabel Admin Menus

function plt_hide_gtbabel_menus() {
	//Hide "Gtbabel".
	remove_menu_page('gtbabel-settings');
	//Hide "Gtbabel → Settings".
	remove_submenu_page('gtbabel-settings', 'gtbabel-settings');
	//Hide "Gtbabel → String translations".
	remove_submenu_page('gtbabel-settings', 'gtbabel-trans');
	//Hide "Gtbabel → Language picker".
	remove_submenu_page('gtbabel-settings', 'gtbabel-lngpicker');
	//Hide "Gtbabel → GNU gettext".
	remove_submenu_page('gtbabel-settings', 'gtbabel-gettext');
	//Hide "Gtbabel → Setup wizard".
	remove_submenu_page('gtbabel-settings', 'gtbabel-wizard');
}

add_action('admin_menu', 'plt_hide_gtbabel_menus', 11);

Where do I put this code?

How to Hide Gtbabel Meta Boxes

function plt_hide_gtbabel_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Translations" meta box.
	remove_meta_box('gtbabel-trans-links', $screen->id, 'side');
	//Hide the "Source language" meta box.
	remove_meta_box('gtbabel-trans-lng-source', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_gtbabel_metaboxes', 20);