345bdd3db0
Previously the ngfactory shim generator in ngtsc would always write two imports in the factory file shims: 1) an import to @angular/core 2) an import to the base file If the base file has no exports, import #2 would be empty. This turns out to cause issues downstream. This commit changes the generated shim so if there are no exports in the base file, the generated shim is empty too. PR Close #27470