Modify epoch boundary comments

Author: jihoonsong

specs/gloas/fork-choice.md

@@ -793,7 +793,7 @@ def get_proposer_head(store: Store, head_node: ForkChoiceNode, slot: Slot) -> Fo
     # Only re-org the head block if it arrived later than the attestation deadline.
     head_late = is_head_late(store, head_node.root)
 
-    # Do not re-org on an epoch boundary where the proposer shuffling could change.
+    # Do not re-org on an epoch boundary.
     epoch_boundary = is_epoch_boundary(slot)
 
     # Ensure that the FFG information of the new head will be competitive with the current head.

specs/phase0/fork-choice.md

@@ -671,7 +671,7 @@ def get_proposer_head(store: Store, head_node: ForkChoiceNode, slot: Slot) -> Fo
     # Only re-org the head block if it arrived later than the attestation deadline.
     head_late = is_head_late(store, head_node.root)
 
-    # Do not re-org on an epoch boundary where the proposer shuffling could change.
+    # Do not re-org on an epoch boundary.
     epoch_boundary = is_epoch_boundary(slot)
 
     # Ensure that the FFG information of the new head will be competitive with the current head.