message: Remove unnecessary check for throwError.
diff: @@ -202,11 +202,6 @@ export class ProjectConfig {
  if (result.errors.length > 0) {
  throw result.errors[0];
  }
  - if (result.throwError) {
  - throw new Error(
  - `An error was encountered while validating the ` +
  - `Polymer Project Config.`);
  - }
  return configJsonObject;
  }
  