How to Hide Knowledge Base for Documents and FAQs Admin Menus

function plt_hide_echo_knowledge_base_menus() {
	//Hide "Knowledge Base".
	remove_menu_page('edit.php?post_type=epkb_post_type_1');
	//Hide "Knowledge Base → Get Started".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'edit.php?post_type=epkb_post_type_1&page=epkb-kb-need-help');
	//Hide "Knowledge Base → All Articles".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'edit.php?post_type=epkb_post_type_1');
	//Hide "Knowledge Base → Add New Article".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'post-new.php?post_type=epkb_post_type_1');
	//Hide "Knowledge Base → Categories".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'edit-tags.php?taxonomy=epkb_post_type_1_category&post_type=epkb_post_type_1');
	//Hide "Knowledge Base → Tags".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'edit-tags.php?taxonomy=epkb_post_type_1_tag&post_type=epkb_post_type_1');
	//Hide "Knowledge Base → FAQs".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'epkb-faqs');
	//Hide "Knowledge Base → Configuration".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'epkb-kb-configuration');
	//Hide "Knowledge Base → Analytics".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'epkb-plugin-analytics');
	//Hide "Knowledge Base → Add-ons".
	remove_submenu_page('edit.php?post_type=epkb_post_type_1', 'epkb-add-ons');
}

add_action('admin_menu', 'plt_hide_echo_knowledge_base_menus', 12);

Where do I put this code?