Remove required reference to discussion on feature request template

Author: ricardoV94

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -21,15 +21,6 @@ body:
       Check the [Contributor Guide](https://github.com/pymc-devs/pymc/blob/main/CONTRIBUTING.md)
       if you need more information.
 
-- type: textarea
-  attributes:
-    label: "Link to a discussion"
-    description: >
-      Link to the discussion about this feature request in
-      [Discussions](https://github.com/pymc-devs/pymc/discussions)
-  validations:
-    required: true
-
 - type: textarea
   attributes:
     label: "Before"