Remove some unneded references

Author: javiereguiluz

reference/attributes.rst

@@ -89,8 +89,8 @@ Routing
 Scheduler
 ~~~~~~~~~
 
-* :ref:`AsCronTask <scheduler_cron-expression-triggers>`
-* :ref:`AsPeriodicTask <scheduler_periodical-triggers>`
+* :ref:`AsCronTask <scheduler-attributes-cron-task>`
+* :ref:`AsPeriodicTask <scheduler-attributes-periodic-task>`
 * :ref:`AsSchedule <scheduler_attaching-recurring-messages>`
 
 Security

scheduler.rst

@@ -182,8 +182,6 @@ methods::
 Most of them can be created via the :class:`Symfony\\Component\\Scheduler\\RecurringMessage`
 class, as shown in the following examples.
 
-.. _scheduler_cron-expression-triggers:
-
 Cron Expression Triggers
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -272,8 +270,6 @@ For example::
     The day of month range is ``1-28``, this is to account for February
     which has a minimum of 28 days.
 
-.. _scheduler_periodical-triggers:
-
 Periodical Triggers
 ~~~~~~~~~~~~~~~~~~~