LU-6245 libcfs: remove atomic cpt allocations

LU-6245 libcfs: remove atomic cpt allocations

libcfs contains functions to perform atomic memory
operations. These functions have never been used
so remove them.

Change-Id: I48dff483c4560700acbddff6268735837ed12b79
Signed-off-by: frank zago <fzago@cray.com>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: http://review.whamcloud.com/15913
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>