MC-10871: [Sec] XSS Injection in HTML Code Content Type

- Revert commenting <deleteData />

Author: davemacaulay

app/code/Magento/PageBuilder/Test/Mftf/Test/AdminPageBuilderBlockTest.xml

@@ -1475,7 +1475,7 @@
             </actionGroup>
         </before>
         <after>
-            <!--<deleteData createDataKey="createPreReqBlock" stepKey="deletePreReqBlock" />-->
+            <deleteData createDataKey="createPreReqBlock" stepKey="deletePreReqBlock" />
             <actionGroup ref="logout" stepKey="logout"/>
         </after>
         <!-- Edit Block and configure Row - Vertical Align Bottom -->