clean out old MSG_* macros (was ACTS-127)
Original author Christian Gumpert @cgumpert
The new macros for logging are ACTS_* which reside in Utilities/Logger.hpp. The usage of MSG_* macros is deprecated and should be removed as should the associated header files:
The precompiler macro ACTS_MSG_MACROS_PLUGIN becomes obsolete as well.
Edited by Moritz Kiehn