Debugger: Remove messaging indirection in DebuggerRunControl

The base functionality is good enough.

Change-Id: Ie39398828733245e0e74ca9a2941c069116014f0
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/debugger/debuggerrunner.h

@@ -32,7 +32,6 @@
 #define DEBUGGERRUNNER_H
 
 #include "debugger_global.h"
-#include "debuggerconstants.h"
 
 #include <projectexplorer/runconfiguration.h>
 
@@ -61,8 +60,6 @@ public:
     void debuggingFinished();
     DebuggerEngine *engine();
 
-    void showMessage(const QString &msg, int channel);
-
 signals:
     void engineRequestSetup();