Remove Open Effects Association references from README

[jmertic]

The README has references to the Open Effects Association being a current group; that should be corrected to either remove the reference or indicate it was the previous steward.

[garyo]

Hi @jmertic I don't see anything about the Association in the README. Could you confirm what branch you're looking at? That said, I did find a few stray references in other files, and opened a PR #205 just now to remove them.

[jmertic]

Thanks @garyo - added a few comments on the PR.

Here is where I saw the reference - https://github.com/AcademySoftwareFoundation/openfx/blob/website/readme.md

[garyo]

Ah yes, the source for the old website is on a branch called website. I don't often look at those ancient branches. I'll just remove that branch. (Update: ✓Done.)