Update 5.x-rc.md

doc/5.x-rc.md

@@ -8,10 +8,6 @@ See [Prerequisites](any-prereq.md)
 
 * Note the original branch, such as `master`.
 * Note the intended version, such as `5.1` or `5.3`. (In the rest of this document, we'll refer to `5.X`, but `5.X` should be adjusted to circumstance.)
-* In `civicrm-core.git` repo, check that the code in `master` correctly references `5.X.alpha1`:
-    * https://github.com/civicrm/civicrm-core/blob/master/xml/version.xml
-    * https://github.com/civicrm/civicrm-core/blob/master/sql/civicrm_generated.mysql
-    * https://github.com/civicrm/civicrm-core/tree/master/CRM/Upgrade/Incremental
 * In Jenkins, review the scheduled tests for `master` and determine if anything should block the RC.
     * https://test.civicrm.org/job/CiviCRM-Core-Matrix/
     * https://test.civicrm.org/job/CiviCRM-Ext-Matrix/