Deleted castor::utils::Timer

tapeserver/castor/tape/tapeserver/daemon/CatalogueDrive.hpp

...ver/castor/tape/tapeserver/daemon/DataTransferSession.cpp

tapeserver/castor/tape/tapeserver/daemon/DiskReadTask.cpp

...rver/castor/tape/tapeserver/daemon/DiskReadThreadPool.cpp

...rver/castor/tape/tapeserver/daemon/DiskReadThreadPool.hpp

tapeserver/castor/tape/tapeserver/daemon/DiskWriteTask.cpp

...ver/castor/tape/tapeserver/daemon/DiskWriteThreadPool.cpp

...ver/castor/tape/tapeserver/daemon/DiskWriteThreadPool.hpp

...er/castor/tape/tapeserver/daemon/TapeReadSingleThread.cpp

...er/castor/tape/tapeserver/daemon/TapeReadSingleThread.hpp

tapeserver/castor/tape/tapeserver/daemon/TapeReadTask.hpp

...stor/tape/tapeserver/daemon/TapeSingleThreadInterface.hpp

...r/castor/tape/tapeserver/daemon/TapeWriteSingleThread.cpp

...r/castor/tape/tapeserver/daemon/TapeWriteSingleThread.hpp

tapeserver/castor/tape/tapeserver/daemon/TapeWriteTask.cpp

tapeserver/castor/tape/tapeserver/daemon/TapeWriteTask.hpp

tapeserver/castor/tape/tapeserver/daemon/TaskWatchDog.hpp

tapeserver/castor/tape/tapeserver/drive/DriveGeneric.cpp

tapeserver/castor/utils/CMakeLists.txt

tapeserver/castor/utils/Timer.cpp