remove None from team role selection (#656)

Teams are required to have a Role, so None should not be an option.

Author: sei-aschlackman

src/app/components/admin-app/roles-permissions-select/roles-permissions-select.component.html

@@ -17,7 +17,7 @@
     (selectionChange)="updateRole($event.value)"
     placeholder="Role"
   >
-    <mat-option value="">None</mat-option>
+    <mat-option *ngIf="user" value="">None</mat-option>
     <mat-option *ngFor="let role of roles$ | async" [value]="role.id">
       {{ role.name }}
     </mat-option>

src/app/components/admin-app/roles-permissions-select/roles-permissions-select.component.ts

@@ -13,13 +13,10 @@ import {
   Team,
   UserService,
   TeamService,
-  RoleService,
   Permission,
-  PermissionService,
 } from '../../../generated/player-api';
 import { TeamRolesService } from '../../../services/roles/team-roles.service';
 import { TeamPermissionsService } from '../../../services/permissions/team-permissions.service';
-import { forkJoin, tap } from 'rxjs';
 import { RolesService } from '../../../services/roles/roles.service';
 
 export enum ObjectType {