clang-13: remove unused variables flagged by clang

clang-13: remove unused variables flagged by clang

Clang-13 changed the default for the unused-but-set-variable resulting
in build warnings/errors with the following type of messages

vsprocs.c:3493:25: error: variable 'tentries' set but not used
    [-Werror,-Wunused-but-set-variable]
       afs_int32 nentries, tentries = 0;

The locations where these local variables are being flagged show that
while the variables are being updated, they are actually never used for
anything (e.g. used as part of an assignment to another variable, passed
as a parameter, used for as returned value, etc.)

Remove the variables being flagged by the clang-13 compiler.

Removal of these variables will not alter the overall functionality of
the code.

Change-Id: I521ea1323837e0d293e6f45eb8c15d5e05765f19
Reviewed-on: https://gerrit.openafs.org/14775
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>