MAGETWO-95595: Index names are ignored by declarative schema

- test disable index

Author: rganin

dev/tests/setup-integration/_files/Magento/TestSetupDeclarationModule1/etc/db_schema.xml

@@ -65,8 +65,5 @@
             <column name="tinyint"/>
             <column name="bigint"/>
         </index>
-        <index referenceId="TEST_TABLE_INDEX_VARCHAR" indexType="btree">
-            <column name="varchar"/>
-        </index>
     </table>
 </schema>