Misc: Update issues form (#4383)

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,13 +1,7 @@
 name: Feature Request
 description: Suggest a new feature for Ryujinx.
+title: "[Feature Request] <title>"
 body:
-  - type: checkboxes
-    attributes:
-      label: Is there an existing issue for this?
-      description: Please search to see if an issue already exists for the feature you are requesting.
-      options:
-      - label: I have searched the existing issues
-        required: true
   - type: textarea
     id: overview
     attributes: