[PATCH] t7811 (grep-open): remove test_config() redefinition

test_config() is already a well-defined function in
test-lib-functions.sh.  Don't duplicate it unnecessarily.

Signed-off-by: Ramkumar Ramachandra <redacted>
---
 Found this while randomly grep'ping around.

 t/t7811-grep-open.sh | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/t/t7811-grep-open.sh b/t/t7811-grep-open.sh
index a895778..e1951a5 100755
--- a/t/t7811-grep-open.sh
+++ b/t/t7811-grep-open.sh

@@ -125,11 +125,6 @@ test_expect_success 'modified file' '
 	test_cmp empty out
 '
 
-test_config() {
-	git config "$1" "$2" &&
-	test_when_finished "git config --unset $1"
-}
-
 test_expect_success 'copes with color settings' '
 	rm -f actual &&
 	echo grep.h >expect &&

-- 
1.8.2