Don't automegre scala-stewrad PRs

Author: ignasi35

.mergify.yml

@@ -12,18 +12,6 @@ pull_request_rules:
         method: merge
         strict: smart
 
-  - name: Merge ScalaSteward's PRs that are ready
-    conditions:
-      - author=scala-steward
-      - status-success=Travis CI - Pull Request
-      - "#review-requested=0"
-      - "#changes-requested-reviews-by=0"
-      - label!=status:block-merge
-    actions:
-      merge:
-        method: merge
-        strict: smart
-
   - name: Delete the PR branch after merge
     conditions:
       - merged