remove CLA reference from LICENSE. (#931)

As approved by BoD on 2020-04-06.

Committed via https://github.com/asottile/all-repos

Author: cg505

LICENSE

@@ -22,9 +22,7 @@ Commons Attribution 4.0 International ("CC BY 4.0") license. A
 human-readable summary of the CC BY 4.0 is available at:
 https://creativecommons.org/licenses/by/4.0/
 
-All copyrights are owned by the original contributors. Contributors are
-required to sign the Open Computing Facility's CLA, which allows the Board
-to license their contributions.
+All copyrights are owned by the original contributors.
 
 Note that while we have attempted to identify which files in this
 repository do not contain exclusively OCF contributions (and thus are