remove reviewers information in pr template

Author: thefoxis

.github/pull_request_template.md

@@ -22,9 +22,3 @@ Learn more about linking Pull Requests to issues [here](https://docs.github.com/
 
 ## Screenshots
 If this work introduces any visual changes, add screenshots to portray them.
-
-## Reviewers
-Mention one or more project maintainers here or request review directly in the right sidebar in the Reviewers section:
-
-- @benschwarz or @mikedijkstra for engineering review
-- @thefoxis for content and copy review