Deprecates and removes the non-standard `workerMatchedSourceType` and `workerFinalSourceType` attributes from the Resource Timing and Navigation Timing APIs. These fields were introduced during the experimental phase of the Service Worker Static Routing API and have been replaced by the spec-compliant attributes `workerMatchedRouterSource` and `workerFinalRouterSource`. Note that the addition of the new, spec-compliant fields is handled in a separate Chrome Status entry (https://chromestatus.com/feature/5172259800088576)