LU-2675 libcfs: remove unused libcfs.a code

LU-2675 libcfs: remove unused libcfs.a code

Remove unused code from libcfs.a. Delete the files:

  libcfs/libcfs/posix/posix-adler.c
  libcfs/libcfs/posix/posix-crc32.c
  libcfs/libcfs/posix/posix-debug.c
  libcfs/libcfs/posix/posix-proc.c
  libcfs/libcfs/posix/rbtree.c
  libcfs/libcfs/user-bitops.c
  libcfs/libcfs/user-crc32pclmul.c
  libcfs/libcfs/user-crypto.c
  libcfs/libcfs/user-lock.c
  libcfs/libcfs/user-mem.c
  libcfs/libcfs/user-prim.c
  libcfs/libcfs/user-tcpip.c

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: Ic7b6539147fc66a3cefa0caddfc995474014e098
Reviewed-on: http://review.whamcloud.com/10668
Tested-by: Jenkins
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>