Revert "Correctly trigger a Konsole window when using single process"

This reverts commit 59ff5d37.

This fixes --nofork which was broken in 20.04.

!110

src/main.cpp

@@ -163,8 +163,6 @@ extern "C" int Q_DECL_EXPORT kdemain(int argc, char *argv[])
     if (!Konsole::KonsoleSettings::useSingleInstance()
         && !parser->isSet(QStringLiteral("new-tab"))) {
         startupOption = KDBusService::Multiple;
-    } else if (Konsole::KonsoleSettings::useSingleInstance()) {
-        startupOption = KDBusService::Unique;
     }
 
     atexit(deleteQApplication);