contributing: Update contributing page

Summary: * update contributing page so it doesn't say we're volunteer-driven

Test Plan: make lint test

Reviewers: anu, rschlussel, mf186042

Reviewed By: mf186042

Subscribers: mf186042

Differential Revision: https://phabricator.td.teradata.com/D756

Author: cawallin

CONTRIBUTING.rst

@@ -49,8 +49,6 @@ If you are proposing a feature:
 
 * Explain in detail how it would work.
 * Keep the scope as narrow as possible, to make it easier to implement.
-* Remember that this is a volunteer-driven project, and that contributions
-  are welcome :)
 
 Get Started!
 ------------