remove gratsy from sites.yml (#21836)

Author: Belco90

docs/sites.yml

@@ -6729,18 +6729,6 @@
     - Nonprofit
   built_by: Jacob Herper
   built_by_url: https://herper.io
-- title: Gratsy
-  url: https://gratsy.com/
-  main_url: https://gratsy.com/
-  description: >
-    Gratsy: Feedback To Give Back
-  categories:
-    - Agency
-    - Marketing
-    - Landing Page
-  built_by: Whalar
-  built_by_url: https://whalar.com/
-  featured: false
 - title: deepThreads
   main_url: https://deepthreads.com
   url: https://deepthreads.com/