[pkg-go] Bug#856615: Second Look

[Michael Lustfield]

After taking a closer look at the source code, I believe the included
Apache-2.0 reference is a mistake.

The source code that is licensed with Apache-2.0 is available here:
    https://neil.fraser.name/software/diff_match_patch/svn/trunk/

None of this source code is present in this source code:
    https://github.com/sergi/go-diff

Because no source code was reproduced, this is a completely unique
implementation (in the Go language).

I have submitted a PR with upstream to request dropping reference to the
Apache-2.0 license as this implementation is otherwise correctly licensed.
-- 
Michael Lustfield