Update PULL_REQUEST_TEMPLATE.md

Author: jfversluis

.github/PULL_REQUEST_TEMPLATE.md

@@ -7,7 +7,3 @@ _Use this area to describe your submission. Screenshots are appreciated and GIFs
 ### Possible platform improvements
 
 _Missing something on the platform? Let us know here._
-
-### .NET MAUI Beautiful UI Challenge (August 2022)
-
-If you're submitting this during August 2022, you can enter in the [.NET MAUI Beautiful UI Challenge](https://aka.ms/maui/uichallenge)! After submitting your pull request, grab the URL and fill out the quick form at https://www.surveymonkey.com/r/maui-ui-challenge to let us know where to send your stickers!