Remove useless guards around #define's in qconfig.h

These are not meant to be overwritten by command line defines
anyway. Bad things could happen if they are not in sync with
the values in the pro files.

If you want to change them, reconfigure Qt.

Change-Id: Ic456e54b97e6909f01a4f4be33e3d7e2b2571e80
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

mkspecs/features/qt_configure.prf

@@ -1471,9 +1471,7 @@ defineTest(qtConfProcessOutput) {
         } else {
             for (define, config.output.$${type}._KEYS_) {
                 value = $$eval(config.output.$${type}.$${define})
-                config.output.$$type += "$${LITERAL_HASH}ifndef $$define"
                 config.output.$$type += "$${LITERAL_HASH}define $$define $$value"
-                config.output.$$type += "$${LITERAL_HASH}endif"
             }
         }
         defined(qtConfOutputPostProcess_$${type}, test): \