Some of those are good.. Wbtrvmem.b and WbtrvMemo.B are the Evo Notes.  BKGLTMP1-5 are files used by GL posting.
XXICMSTR is a copy of BKICMSTR it is unused but it is a DBA/Evo Standard file and we may use it someday. Same goes for the SUM* files. Testfile is in my dictionary too, but never used, same with tempold.  
 
  So out of your list only UMCDATA could be erased.  The rest would just be recreated the next time you run update, if you deleted them, and you would potentially lose data (Notes)