QmlProfiler: Remove OST connection mode

Whatever that is, it definitely didn't work.

Change-Id: Ib15b9dcad6e22d52285a253b234989e55d817268
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

src/plugins/qmlprofiler/qmlprofilerclientmanager.h

@@ -50,9 +50,7 @@ public:
     ~QmlProfilerClientManager();
 
     void registerProfilerStateManager(QmlProfilerStateManager *profilerState);
-
     void setTcpConnection(QString host, quint64 port);
-    void setOstConnection(QString ostDevice);
 
     void clearBufferedData();
     void discardPendingData();