Improve new error message

No need to display the URL of the thing that failed to install in the
passivenotification.

discover/DiscoverObject.cpp

@@ -296,7 +296,7 @@ void DiscoverObject::openApplication(const QUrl& url)
                     emit openApplicationInternal(res.first());
                 } else if (url.scheme() == QLatin1String("snap")) {
                     openApplication(QUrl(QStringLiteral("appstream://org.kde.discover.snap")));
-                    showPassiveNotification(i18n("Please make sure snap support is installed %1", url.toDisplayString()));
+                    showPassiveNotification(i18n("Please make sure Snap support is installed"));
                 } else {
                     Q_EMIT openErrorPage(i18n("Could not open %1", url.toDisplayString()));
                 }