Some of our linter rules duplicate parts of existing validation, either from our own or built-in rules. Fix the duplicates by deciding which message should take precedence.
Affected rules:
- wikimedia-require-contact
- wikimedia-valid-server-variables
- wikimedia-paths-GET-summary
- wikimedia-paths-operation-summary-exists-no-periods
- wikimedia-requestbody-example-summary
- wikimedia-response-example-description
- wikimedia-example-object-value-externalvalue