Follow-up to r1549924:  Simplify code.
Follow-up to r1549924:  Simplify code.

* subversion/libsvn_fs_fs/index.c
  (index_create): Exploit the fact that svn_io_remove_file2 already
                  handles the r/o and n/a cases.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1553045 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion