Remove portable, we dont use it

src/main.cpp

@@ -134,7 +134,6 @@ int main(int argc, char* argv[]) {
     // Only start a core application now so we can check if there's another instance without requiring an X server.
     // This MUST be done before parsing the commandline options so QTextCodec gets the right system locale for filenames.
     SingleCoreApplication core_app(argc, argv, true, SingleCoreApplication::Mode::User | SingleCoreApplication::Mode::ExcludeAppVersion | SingleCoreApplication::Mode::ExcludeAppPath);
-    Utilities::CheckPortable();
     // Parse commandline options - need to do this before starting the full QApplication so it works without an X server
     if (!options.Parse()) return 1;
     logging::SetLevels(options.log_levels());