This was done automatically by tslint, which can now fix issues it finds. The fixer is still pending in PR https://github.com/palantir/tslint/pull/1568 Also I have a local bugfix for https://github.com/palantir/tslint/issues/1569 which causes too many imports to be deleted.
BREAKING CHANGE: web worker platform is now exported via separate packages. Please use @angular/platform-webworker and @angular/platform-webworker-dynamic