t4212: loosen far-in-future test for AIX

diff --git a/t/t7811-grep-open.sh b/t/t7811-grep-open.sh
index a8957782cfb8fae4b7c171d4c9db24ce6cd5505e..e1951a5cbb759a0f233b624a1a1a7e9c55ff9640 100755 (executable)
--- 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 &&