[upstream_utils] Remove git version from upstream patches (#4351)

This reduces commit noise when other git versions are used. The version
was removed by passing `--no-signature` to `git format-patch` which is
now documented in the readme.

upstream_utils/stack_walker_patches/0001-Apply-PR-35.patch

@@ -1351,6 +1351,3 @@ index 220c97b..496021e 100644
  };
  
  void Func5()
--- 
-2.20.1.windows.1
-