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/android/androidrunconfiguration.h

@@ -59,7 +59,6 @@ public:
     QString proFilePath() const;
 
     const QString remoteChannel() const;
-    const QString dumperLib() const;
 
     bool isEnabled() const;
     QString disabledReason() const;