Remove support for !shadowBuild

In ancient times we needed to support some qt versions that didn't support shadow
building. This code has been unused for some versions now, so remove it completely.

Change-Id: I311f255d6bfed6841e94c9c383bd9929d0d55520
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/plugins/qmakeprojectmanager/qmakestep.cpp

@@ -159,9 +159,6 @@ QString QMakeStep::allArguments(bool shorted)
     QString args = QtcProcess::joinArgs(arguments);
     // User arguments
     QtcProcess::addArgs(&args, m_userArgs);
-    // moreArgumentsAfter
-    foreach (const QString &arg, deducedArgumentsAfter())
-        QtcProcess::addArg(&args, arg);
     return args;
 }
 
@@ -199,25 +196,6 @@ QStringList QMakeStep::deducedArguments()
     return arguments;
 }
 
-/// -after OBJECTS_DIR, MOC_DIR, UI_DIR, RCC_DIR
-QStringList QMakeStep::deducedArgumentsAfter()
-{
-    QtSupport::BaseQtVersion *version = QtSupport::QtKitInformation::qtVersion(target()->kit());
-    if (version && !version->supportsShadowBuilds()) {
-        // We have a target which does not allow shadow building.
-        // But we really don't want to have the build artefacts in the source dir
-        // so we try to hack around it, to make the common cases work.
-        // This is a HACK, remove once all make generators support
-        // shadow building
-        return QStringList() << QLatin1String("-after")
-                             << QLatin1String("OBJECTS_DIR=obj")
-                             << QLatin1String("MOC_DIR=moc")
-                             << QLatin1String("UI_DIR=ui")
-                             << QLatin1String("RCC_DIR=rcc");
-    }
-    return QStringList();
-}
-
 bool QMakeStep::init()
 {
     QmakeBuildConfiguration *qt4bc = qmakeBuildConfiguration();