Debugger: Remove dead code

Change-Id: Id626cd25efec5fd00ccd87fac4de429c9cdabf8b
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/debugger/memoryagent.cpp

@@ -83,8 +83,6 @@ namespace Internal {
     \sa Debugger::MemoryView,  Debugger::RegisterMemoryView
 */
 
-namespace { const int DataRange = 1024 * 1024; }
-
 MemoryAgent::MemoryAgent(DebuggerEngine *engine)
     : QObject(engine), m_engine(engine)
 {