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/t4211/sha1/expect.simple-f

@@ -1,59 +0,0 @@
-commit a6eb82647d5d67f893da442f8f9375fd89a3b1e2
-Author: Thomas Rast <trast@student.ethz.ch>
-Date:   Thu Feb 28 10:45:16 2013 +0100
-
-    touch both functions
-
-diff --git a/a.c b/a.c
---- a/a.c
-+++ b/a.c
-@@ -3,9 +3,9 @@
--int f(int x)
-+long f(long x)
- {
- 	int s = 0;
- 	while (x) {
- 		x >>= 1;
- 		s++;
- 	}
- 	return s;
- }
-
-commit f04fb20f2c77850996cba739709acc6faecc58f7
-Author: Thomas Rast <trast@student.ethz.ch>
-Date:   Thu Feb 28 10:44:55 2013 +0100
-
-    change f()
-
-diff --git a/a.c b/a.c
---- a/a.c
-+++ b/a.c
-@@ -3,8 +3,9 @@
- int f(int x)
- {
- 	int s = 0;
- 	while (x) {
- 		x >>= 1;
- 		s++;
- 	}
-+	return s;
- }
-
-commit de4c48ae814792c02a49c4c3c0c757ae69c55f6a
-Author: Thomas Rast <trast@student.ethz.ch>
-Date:   Thu Feb 28 10:44:48 2013 +0100
-
-    initial
-
-diff --git a/a.c b/a.c
---- /dev/null
-+++ b/a.c
-@@ -0,0 +3,8 @@
-+int f(int x)
-+{
-+	int s = 0;
-+	while (x) {
-+		x >>= 1;
-+		s++;
-+	}
-+}