Backed out changeset 2f69dc403886 (bug 1716714) for causing bug 1717007.

editor/libeditor/DeleteNodeTransaction.cpp

@@ -79,10 +79,7 @@ NS_IMETHODIMP DeleteNodeTransaction::DoTransaction() {
     return NS_OK;
   }
 
-  // TODO(krosylight): Restore this as a MOZ_ASSERT after fixing bug 1716714
-  // MOZ_ASSERT_IF(mEditorBase->IsTextEditor(), !mContentToDelete->IsText());
-  MOZ_DIAGNOSTIC_ASSERT(!mEditorBase->IsTextEditor() ||
-                        !mContentToDelete->IsText());
+  MOZ_ASSERT_IF(mEditorBase->IsTextEditor(), !mContentToDelete->IsText());
 
   // Remember which child mContentToDelete was (by remembering which child was
   // next).  Note that mRefContent can be nullptr.