ParachainSystem: Do not emit the SelectCore digest (#8903)

This will be moved into an inherent digest.

As preparation for:
#8893

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
(cherry picked from commit daaaf6b)

Author: bkchr

cumulus/pallets/parachain-system/src/lib.rs

@@ -585,16 +585,6 @@ pub mod pallet {
 			// Always try to read `UpgradeGoAhead` in `on_finalize`.
 			weight += T::DbWeight::get().reads(1);
 
-			// Post a digest that contains the information for selecting a core.
-			let selected_core = T::SelectCore::selected_core();
-			frame_system::Pallet::<T>::deposit_log(
-				cumulus_primitives_core::CumulusDigestItem::SelectCore {
-					selector: selected_core.0,
-					claim_queue_offset: selected_core.1,
-				}
-				.to_digest_item(),
-			);
-
 			weight
 		}
 	}

prdoc/pr_8903.prdoc

@@ -0,0 +1,8 @@
+title: 'ParachainSystem: Do not emit the `SelectCore` digest'
+doc:
+- audience: Runtime Dev
+  description: |-
+    This will be moved into an inherent digest.
+crates:
+- name: cumulus-pallet-parachain-system
+  bump: patch