How to Hide Bit Form Admin Menus

function plt_hide_bit_form_menus() {
	//Hide "Bit Form".
	remove_menu_page('bitform');
	//Hide "Bit Form → All Forms".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/');
	//Hide "Bit Form → Form Templates New".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/form-templates');
	//Hide "Bit Form → App Settings".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/app-settings/recaptcha');
	//Hide "Bit Form → Integrations".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/app-settings/integrations');
	//Hide "Bit Form → SMTP".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/app-settings/smtp');
	//Hide "Bit Form → PDF Setting".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/app-settings/pdf');
	//Hide "Bit Form → CPT".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/app-settings/cpt');
	//Hide "Bit Form → Bit Form API".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/app-settings/api');
	//Hide "Bit Form → Payments".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/app-settings/payments');
	//Hide "Bit Form → Doc & Support".
	remove_submenu_page('bitform', 'admin.php?page=bitform#/doc-support');
	//Hide "Bit Form → Upgrade to Pro".
	remove_submenu_page('bitform', 'https://bit-form.com/#pricing');
}

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

Where do I put this code?