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/t4134-apply-submodule.sh

@@ -8,7 +8,6 @@ test_description='git apply submodule tests'
 . ./test-lib.sh
 
 test_expect_success setup '
-	test_oid_init &&
 	cat > create-sm.patch <<EOF &&
 diff --git a/dir/sm b/dir/sm
 new file mode 160000
@@ -16,7 +15,7 @@ index 0000000..0123456
 --- /dev/null
 +++ b/dir/sm
 @@ -0,0 +1 @@
-+Subproject commit $(test_oid numeric)
++Subproject commit 0123456789abcdef0123456789abcdef01234567
 EOF
 	cat > remove-sm.patch <<EOF
 diff --git a/dir/sm b/dir/sm
@@ -25,7 +24,7 @@ index 0123456..0000000
 --- a/dir/sm
 +++ /dev/null
 @@ -1 +0,0 @@
--Subproject commit $(test_oid numeric)
+-Subproject commit 0123456789abcdef0123456789abcdef01234567
 EOF
 '