qmakestep: remove spurious comment

Change-Id: I55ee4b24ccb3789b2bbd75e0bb9a2176cbb8522e
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/qmakeprojectmanager/qmakestep.cpp

@@ -156,7 +156,6 @@ QString QMakeStep::allArguments(bool shorted)
 
 ///
 /// moreArguments,
-/// -unix for Maemo
 /// iphoneos/iphonesimulator for ios
 /// QMAKE_VAR_QMLJSDEBUGGER_PATH
 QStringList QMakeStep::deducedArguments()