Utils: Make Environment::setEnglishOutput a proper member function

The previous indirection was useful as long as they were overloads
for QProcessEnvironment and QStringList, but these are gone now.

Change-Id: I5066bd2e72fd06948a5cc7bbac6dda9006db96ed
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp

@@ -202,7 +202,7 @@ static FilePath qmakeFromCMakeCache(const CMakeConfig &config)
     cmake.setTimeoutS(5);
     cmake.setDisableUnixTerminal();
     Environment env = Environment::systemEnvironment();
-    Environment::setupEnglishOutput(&env);
+    env.setupEnglishOutput();
     cmake.setEnvironment(env);
     cmake.setTimeOutMessageBoxEnabled(false);