(maint) Remove non-working conditions

There are several conditions in for mergify we were using that no
longer works as expected. As such, it is just appropriate that we
remove these conditions.

Signed-off-by: Kim J. Nordmo <[email protected]>

.mergify.yml

@@ -1,37 +1,4 @@
 pull_request_rules:
-  - name: Add Documentation label for documentation changes, but not in source
-    conditions:
-      - "files~=^(docs/.*|README.md|CODE_OF_CONDUCT.md|CONTRIBUTING.md)$"
-      - "-files~=^src/Cake.Codecov/.*$"
-    actions:
-      label:
-        add: ["Documentation"]
-  - name: Add build label when no change in source, and not in documentation
-    conditions:
-      - "-files~=^(docs/.*|README.md|CODE_OF_CONDUCT.md|CONTRIBUTING.md)$"
-      - "-files~=^src/Cake.Codecov/.*$"
-      - "-title~=Cake.Core"
-    actions:
-      label:
-        add: ["Build"]
-  - name: "Add Breaking change when Cake.Core is mentioned in title"
-    conditions:
-      - "title~=Cake.Core"
-    actions:
-      label:
-        add: ["Breaking Change"]
-  - name: "Merge Pull Request when CI passes, and no outstanding issues"
-    conditions:
-      - "status-success=continuous-integration/appveyor/pr"
-      - "status-success=continuous-integration/travis-ci/pr"
-      - "status-success=codecov/patch"
-      - "#approved-reviews-by>=1"
-      - "#review-requested=0"
-      - "#changes-requested-reviews-by=0"
-      - "#commented-reviews-by=0"
-    actions:
-      merge:
-        method: squash
   - name: thank user and refer them to add themself as contributor
     conditions:
       - merged