MC-160: Admin should be able to delete catalog price rule

- Remove flush cache via ui

Author: tomreece

app/code/Magento/CatalogRule/Test/Mftf/Test/AdminDeleteCatalogPriceRuleTest.xml

@@ -75,7 +75,6 @@
         <click selector="{{AdminCatalogPriceRuleGrid.applyRules}}" stepKey="clickApplyRules"/>
         <magentoCLI command="indexer:reindex" stepKey="reindex"/>
         <magentoCLI command="cache:flush" stepKey="flushCache"/>
-        <actionGroup ref="ClearCacheActionGroup" stepKey="clearCache"/>
 
         <!-- Verify that category page shows the original prices -->
         <amOnPage url="$$createCategory.name$$.html" stepKey="goToCategoryPage2"/>