[Openid-specs-fapi] Issue #291: Remove older specs from master (openid/fapi)

[dgtonge]

New issue 291: Remove older specs from master
https://bitbucket.org/openid/fapi/issues/291/remove-older-specs-from-master

Dave Tonge:

We have some older specs, e.g. Parts 3,4,5 that are not in active development.

We discussed removing them from the master branch to avoid confusion.

If we ever need them in the future we can get them from Git history

Responsible: Dave Tonge