additional minor fix to messaging reference

Author: LandauRaz

modules/resources/pages/messaging-reference.adoc

@@ -2,8 +2,6 @@
 = Messaging functions and events reference
 :description: Comprehensive function and event reference for the `StarknetMessaging` smart contracts.
 
-The `StarknetMessaging` smart contracts include functions and events that are required when sending messages between L1 and L2.
-
 [TIP]
 ====
 For information on the messaging mechanism, see xref:architecture:messaging.adoc[Messaging mechanism].