Remove unused CSS class

projects/editor/src/app/components/unit-view/unit-view.component.html

@@ -5,9 +5,7 @@
   </mat-drawer>
 
   <mat-drawer-content>
-    <button mat-button
-            class="testtt"
-            (click)="toolbox_drawer.toggle()">
+    <button mat-button (click)="toolbox_drawer.toggle()">
       Elementauswahl ein-/ausblenden
     </button>
     <button mat-button class="show_properties_button" (click)="properties_drawer.toggle()">