Removed unneeded _git_config override

Relic from extraction from git-supp repository.

bash_completion

@@ -16,18 +16,6 @@
 #  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # #
 
-# override their config function to provide our own options
-eval "$( echo '_prev_git_config ()'; declare -f _git_config | tail -n +2 )"
-_git_config ()
-{
-  _prev_git_config
-
-  _get_comp_words_by_ref -n =: cur prev
-
-  # add our configuration options
-  COMPREPLY=( ${COMPREPLY[@]-} state.delim.left state.delim.right )
-}
-
 __git-short_cmdok ()
 {
   test "${1:0:1}" != -