state: drop epoch_tx

The stamp is the only lock-free epoch label.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/state/host.rs b/src/state/host.rs
index 6bb9d3b..7c3e165 100644
--- a/src/state/host.rs
+++ b/src/state/host.rs
@@ -283,10 +283,10 @@ impl Host for AppState {
                     replica.epoch = epoch;
                     replica.epoch_seq += 1;
                     replica.writable = writable;
+                    // Publishes the epoch with the heads (`Replica::stamps`), under the
+                    // same lock, so it never disagrees with the document for anyone
+                    // holding the lock.
                     replica.refresh_heads();
-                    // Updated under the same lock, so the cached epoch never disagrees
-                    // with the document for anyone holding the lock.
-                    state.epoch_tx.send_replace(epoch);
                     // Reset every peer's sync state before the lock is released, so no
                     // message is generated from or applied to a state that describes the
                     // old document. (Lock order doc -> peer, as in sync generation.)