How to Hide myStickyElements Admin Menus

function plt_hide_mystickyelements_menus() {
	//Hide "myStickyelements".
	remove_menu_page('my-sticky-elements');
	//Hide "myStickyelements → Dashboard".
	remove_submenu_page('my-sticky-elements', 'my-sticky-elements');
	//Hide "myStickyelements → + Create New Widget".
	remove_submenu_page('my-sticky-elements', 'my-sticky-elements&widget=0');
	//Hide "myStickyelements → Chatway Live Chat".
	remove_submenu_page('my-sticky-elements', 'install-chatway-plugin');
	//Hide "myStickyelements → Integrations".
	remove_submenu_page('my-sticky-elements', 'my-sticky-elements-integration');
	//Hide "myStickyelements → Widget Analytics".
	remove_submenu_page('my-sticky-elements', 'my-sticky-elements-analytics');
	//Hide "myStickyelements → Contact Form Leads".
	remove_submenu_page('my-sticky-elements', 'my-sticky-elements-leads');
	//Hide "myStickyelements → Recommended Plugins".
	remove_submenu_page('my-sticky-elements', 'recommended-plugins');
	//Hide "myStickyelements → Upgrade to Pro".
	remove_submenu_page('my-sticky-elements', 'my-sticky-elements-upgrade');
}

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

Where do I put this code?