[SI-614] Fixing code review remarks

projects/grid-failure-information-app/src/app/shared/guards/admin.guard.ts

diff --git a/projects/grid-failure-information-app/src/app/shared/guards/admin.guard.ts b/projects/grid-failure-information-app/src/app/shared/guards/admin.guard.ts
index 8a5e441..1b15c77 100644
--- a/projects/grid-failure-information-app/src/app/shared/guards/admin.guard.ts
+++ b/projects/grid-failure-information-app/src/app/shared/guards/admin.guard.ts
@@ -18,7 +18,6 @@
 import { User } from '@grid-failure-information-app/shared/models/user';
 import { PermissionsModel } from '@grid-failure-information-app/shared/models/permissions.model';
 import { takeUntil, take } from 'rxjs/operators';
-import { RolesEnum } from '../constants/enums';
 
 @Injectable()
 export class AdminGuard implements CanActivate {
@@ -33,7 +32,7 @@
     const isAdmin$: Observable<boolean> = this._appState$
       .select(store.getUser)
       .pipe(takeUntil(this._endSubscriptions$), take(1))
-      .map((user: User) => !!(new PermissionsModel(user.roles).admin));
+      .map((user: User) => !!new PermissionsModel(user.roles).admin);
     isAdmin$.subscribe(isAdmin => !isAdmin && this._router.navigate(['/grid-failures']));
     return isAdmin$.pipe(take(1));
   }