fix UI

frontend/src/app/agent/edit-agent.component.html

@@ -54,15 +54,6 @@
       <mat-icon mat-list-icon>badge</mat-icon>
       <h2 mat-line>{{ codeName.codeName }}</h2>
     </mat-list-item>
-
-    <mat-form-field appearance="fill">
-      <mat-label>Agent role</mat-label>
-      <mat-select [(value)]="selectedRole">
-        <mat-option *ngFor="let role of roles" [value]="role">
-          {{ role }}
-        </mat-option>
-      </mat-select>
-    </mat-form-field>
   </mat-list>
   <mat-list>
     <mat-list-item>