message: removed some documentary text
diff: * Author: The ALICE Off-line Project. *
  * Contributors are mentioned in the code where appropriate. *
  * *
  -* Permission to use, copy, modify and distribute this AliAnalysisTaskCEP.cxxsoftware and its *
  +* Permission to use, copy, modify and distribute this software and its *
  * documentation strictly for non-commercial purposes is hereby granted *
  * without fee, provided that the above copyright notice appears in all *
  * copies and that both the copyright notice and this permission notice *
  