message: chatComponent: remove unneeded import
diff: -import {Component, HostListener, Input, OnChanges, OnDestroy, OnInit, SimpleChange} from '@angular/core';
  +import {Component, Input, OnChanges, OnInit, SimpleChange} from '@angular/core';
  import {UserService} from '../../services/user.service';
  import {MessageService} from '../../services/message.service';
  import {ChatService} from '../../services/chat.service';
  import {IMessage} from '../../../../../../../shared/models/IMessage';
  import {SocketIOEvent} from '../../../../../../../shared/models/SoketIOEvent';
  import {MatDialog} from '@angular/material';
  -import {Subscription} from 'rxjs/Subscription';
  import {ChatNameInputComponent} from '../chat-name-input/chat-name-input.component';
  import {fromPromise} from 'rxjs/observable/fromPromise';
  import {Observable} from 'rxjs/Observable';
  @@ -23,7 +22,6 @@ import {FormControl, FormGroup, Validators} from '@angular/forms';
  export class ChatComponent implements OnInit, OnChanges {
  @Input() room: string;
  chatName: string;
  - chatNameSubscription: Subscription;
  messages: IMessage[] = [];
  messageCount: number;
  ioConnection: any;
  