Tracing: Drop restricted start/end times from trace manager

The only thing we need is a flag for QML profiler to decide if it should
show the "full range" option.

Change-Id: I2437c44c2443d9389239e9af79d0672ee1cadbd2
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/qmlprofiler/qmlprofilermodelmanager.h

@@ -78,6 +78,9 @@ public:
     void addEventType(const QmlEventType &type);
     void addEvent(const QmlEvent &event);
 
+    void restrictToRange(qint64 start, qint64 end);
+    bool isRestrictedToRange() const;
+
 signals:
     void typeDetailsChanged(int typeId);
     void typeDetailsFinished();