Debugger: R.I.P. old CDB engine.

src/plugins/debugger/cdb/cdb.pri

src/plugins/debugger/cdb/cdbassembler.cpp

src/plugins/debugger/cdb/cdbassembler.h

src/plugins/debugger/cdb/cdbbreakpoint.cpp

src/plugins/debugger/cdb/cdbbreakpoint.h

src/plugins/debugger/cdb/cdbcom.h

src/plugins/debugger/cdb/cdbcomstub.h

src/plugins/debugger/cdb/cdbcore.pri

src/plugins/debugger/cdb/cdbdebugeventcallback.cpp

src/plugins/debugger/cdb/cdbdebugeventcallback.h

src/plugins/debugger/cdb/cdbdebugoutput.cpp

src/plugins/debugger/cdb/cdbdebugoutput.h

src/plugins/debugger/cdb/cdbdumperhelper.cpp

src/plugins/debugger/cdb/cdbdumperhelper.h

src/plugins/debugger/cdb/cdbengine.cpp

src/plugins/debugger/cdb/cdbengine.h

src/plugins/debugger/cdb/cdbengine_p.h

src/plugins/debugger/cdb/cdbexceptionutils.cpp

src/plugins/debugger/cdb/cdbexceptionutils.h

src/plugins/debugger/cdb/cdbmodules.cpp