How to Hide Disabled Source, Disabled Right Click and Content Protection Admin Menus

function plt_hide_disabled_source_disabled_right_click_and_content_protection_menus() {
	//Hide "Disabled Settings".
	remove_menu_page('disabled-source-disabled-right-click-and-content-protection');
	//Hide "Disabled Settings → Disabled Settings".
	remove_submenu_page('disabled-source-disabled-right-click-and-content-protection', 'disabled-source-disabled-right-click-and-content-protection');
	//Hide "Disabled Settings → Contact Us".
	remove_submenu_page('disabled-source-disabled-right-click-and-content-protection', 'disabled-source-disabled-right-click-and-content-protection-contact');
	//Hide "Disabled Settings → Upgrade".
	remove_submenu_page('disabled-source-disabled-right-click-and-content-protection', 'disabled-source-disabled-right-click-and-content-protection-pricing');
}

add_action('admin_menu', 'plt_hide_disabled_source_disabled_right_click_and_content_protection_menus', 1000000000);

Where do I put this code?