Remove broken clean_hostname trace messages

The trace messages in krb5int_clean_hostname were outputting the
entire contents of the output buffer (mostly uninitialized garbage)
into the trace log.  Since these messages were essentially redundant
with messages in the callers, and were arguably at too low of a level
to begin with, simply remove them.

https://github.com/krb5/krb5/commit/d5aac5c1a010410e79cce4219e618d9ce27d8621
Author: Greg Hudson <ghudson@mit.edu>
Commit: d5aac5c1a010410e79cce4219e618d9ce27d8621
Branch: master
 src/include/k5-trace.h      |    7 -------
 src/lib/krb5/os/hst_realm.c |    2 --
 2 files changed, 0 insertions(+), 9 deletions(-)