fix(combo): remove duplicate igx-combo in template sample (#3248)

Co-authored-by: Nikolay Alipiev <nikolay.alipiev@gmail.com>
Co-authored-by: Deyan Kamburov <dkamburov@users.noreply.github.com>

Author: 3 people

src/app/lists/combo/combo-template/combo-template.component.html

@@ -32,9 +32,7 @@
         <igx-icon>cancel</igx-icon>
     </ng-template>
 
-    <igx-combo>
-        <ng-template igxComboEmpty>
-            <span class="empty-class">No available states</span>
-        </ng-template>
-    </igx-combo>
+    <ng-template igxComboEmpty>
+        <span class="empty-class">No available states</span>
+    </ng-template>
 </igx-combo>