[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/libuv_patches/0004-Cleanup-problematic-language.patch

@@ -59,6 +59,3 @@ index 9442cf1..8976688 100644
        r = uv__open_cloexec(path, mode | O_NOCTTY);
      else
        r = -1;
--- 
-2.25.1
-