revert(3p/git): Revert merge of git upstream at v2.26.2

This causes cgit to serve error pages, which is undesirable.

This reverts commit 5229c9b232, reversing
changes made to f2b211131f.

third_party/git/t/t0014-alias.sh

@@ -37,11 +37,4 @@ test_expect_success 'looping aliases - internal execution' '
 #	test_i18ngrep "^fatal: alias loop detected: expansion of" output
 #'
 
-test_expect_success 'run-command formats empty args properly' '
-    test_must_fail env GIT_TRACE=1 git frotz a "" b " " c 2>actual.raw &&
-    sed -ne "/run_command:/s/.*trace: run_command: //p" actual.raw >actual &&
-    echo "git-frotz a '\'''\'' b '\'' '\'' c" >expect &&
-    test_cmp expect actual
-'
-
 test_done