Remove a redundant check in FSFS.
Remove a redundant check in FSFS.

(make_entry): Do not perform the expensive check for an
 already-existing entry in the parent directory; the callers in tree.c
 have already done so.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion