MAGETWO-40028: CatalogSearch indexer fails when reindex by cron is executed

- Remove dependency of Magento\Indexer to Magento\Search

Author: igrybkov

app/code/Magento/Indexer/etc/module.xml

@@ -9,7 +9,6 @@
     <module name="Magento_Indexer" setup_version="2.0.0">
         <sequence>
             <module name="Magento_Store"/>
-            <module name="Magento_Search"/>
         </sequence>
     </module>
 </config>