remove duplicated header set background to event pages

src/app/pages/chat/chat.module.ts

@@ -17,7 +17,6 @@ import { EditGroupPageModule } from 'src/app/shared/chat/edit-group/edit-group.m
 import { GroupContactsPageModule } from 'src/app/shared/chat/group-messages/group-contacts/group-contacts.module';
 import { MessagesPageModule } from 'src/app/shared/chat/messages/messages.module';
 import { EmptyChatPageModule } from 'src/app/shared/chat/empty-chat/empty-chat.module';
-import { HeaderPageModule } from 'src/app/shared/header/header.module';
 import { NewEventPageModule } from 'src/app/shared/agenda/new-event/new-event.module';
 import { AttendeeModalPageModule } from 'src/app/shared/event/attendee-modal/attendee-modal.module';
 import { FontAwesomeModule } from '@fortawesome/angular-fontawesome';
@@ -32,7 +31,6 @@ import { ImageCropperModule } from 'ngx-image-cropper';
     PipesModule,
     ChatPageRoutingModule,
     RouterModule,
-    HeaderPageModule,
     MessagesPageModule,
     ContactsPageModule,
     GroupMessagesPageModule,

src/app/pages/chat/chat.page.html

@@ -1,7 +1,3 @@
-<ion-header class="ion-no-border">
-  <app-header></app-header>
-</ion-header>
-
 <ion-content class="height-100 container-wrapper">
   <ion-refresher  name="refresher" slot="fixed" (ionRefresh)="doRefresh($event)">