debugger: fix color for changed items in locals and expressions view

Change-Id: I93905f8e97e2738590fecf41ac7294c2f6872335
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/watchdata.cpp

@@ -128,7 +128,6 @@ WatchData::WatchData() :
     valueEnabled(true),
     valueEditable(true),
     error(false),
-    changed(false),
     sortId(0),
     source(0)
 {
@@ -428,11 +427,6 @@ QByteArray WatchData::hexReferencingAddress() const
     return QByteArray();
 }
 
-bool WatchData::hasChanged(const WatchData &old) const
-{
-    return !value.isEmpty() && value != old.value && value != msgNotInScope();
-}
-
 } // namespace Internal
 } // namespace Debugger