Debugger: Remove support for non-Python GDB

This affects mainly Apple's version of GDB. Mac users are advised to
use LLDB, or some recent build of FSF GDB.

Change-Id: I6a7fbb591e79f737e12d08b0e881e9e4d1d9660c
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.h

@@ -65,8 +65,6 @@ public:
     QString executable() const;
     RunMode runMode() const;
     QString commandLineArguments() const;
-    QString dumperLibrary() const;
-    QStringList dumperLibraryLocations() const;
 
     QString workingDirectory() const;
     QtSupport::BaseQtVersion *qtVersion() const;