afs: remove dead ICL (fstrace) code

afs: remove dead ICL (fstrace) code

The ICL code (afs/afs_icl.c) which supports fstrace includes a number of
functions that have been dead code since the original IBM code import.
Some of these seem to have been intended to support fine-grained event
tracing, but the implementation was never completed.

Remove the dead code.  No functional change is incurred by this commit.

Change-Id: If4d6d993175df57d4c5d827ab178ed3ba0bc7ed8
Reviewed-on: https://gerrit.openafs.org/14555
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>