Remove unneeded workarounds

tests/validators/valnum.cpp

@@ -211,16 +211,6 @@ void NumValidatorTestCase::Interactive()
         return;
 #endif // __WXMSW__
 
-#ifdef __WXGTK20__
-    // Travis CI fails without this!
-    if ( IsAutomaticTest() )
-    {
-        wxFrame* frame = wxDynamicCast(wxTheApp->GetTopWindow(), wxFrame);
-        frame->SetFocus();
-        frame->Raise();
-    }
-#endif // __WXGTK20__
-
     // Set a locale using comma as thousands separator character.
     wxLocale loc(wxLANGUAGE_ENGLISH_UK, wxLOCALE_DONT_LOAD_DEFAULT);