message: API: Remove unused WhitelistController imports
diff: import {
  - Authorized, Body, Delete, Get, JsonController, Post, Param, Put, QueryParam, UseBefore,
  - HttpError, BadRequestError, UploadedFile, CurrentUser
  + Authorized, Body, Delete, Get, JsonController, Post, Param, Put, UseBefore,
  + BadRequestError, CurrentUser
  } from 'routing-controllers';
  import passportJwtMiddleware from '../security/passportJwtMiddleware';
  -import {isNullOrUndefined} from 'util';
  import {WhitelistUser} from '../models/WhitelistUser';
  import {errorCodes} from '../config/errorCodes';
  import * as mongoose from 'mongoose';
  