message: API: Remove unused UnitController import
diff: @@ -6,7 +6,6 @@ import passportJwtMiddleware from '../security/passportJwtMiddleware';
  import {Lecture} from '../models/Lecture';
  import {IUnitModel, Unit} from '../models/units/Unit';
  -import {ValidationError} from 'mongoose';
  import {IUser} from '../../../shared/models/IUser';
  @JsonController('/units')
  