mergify: simplify needs CI transition

from review or work - approval and update (pr head yellow) should result in CI run. These 2 preconditions should be
sufficient to move to CI stage.

.mergify.yml

@@ -76,7 +76,7 @@ pull_request_rules:
         remove: 
           - "needs: review"
 
-  # From needs: review to needs: CI
+  # From needs: review or needs: work to needs: CI. One approval means we should be good to start CI
   - name: "label needs: CI when at least one reviewers approval"
     conditions:
       - base~=feature-mergify
@@ -99,28 +99,6 @@ pull_request_rules:
           - "needs: review"
           - "needs: work"
 
-  # From needs: work to needs: CI
-  - name: "label needs: CI it was approved and pr-head needs to be rerun again"
-    conditions:
-      - base~=feature-mergify
-      # Labels
-      - "label=needs: work"
-
-      # Reviewers, at least one approval and no changes requested
-      - "#changes-requested-reviews-by=0"
-      - "#approved-reviews-by>=0"
-
-      # CI green policy, at least Travis should be green
-      - status-success~=continuous-integration/travis-ci/pr
-      # new CI needs to be done
-      - status-neutral~=continuous-integration/jenkins/pr-head
-    actions:
-      label:
-        add: 
-          - "needs: CI"
-        remove: 
-          - "needs: work"
-
   # Conflict in the PR - needs: work and a comment to notify a user
   - name: "label needs: work when there is a conflict"
     conditions: