Delete whatTheMergeTouched, IsStaleRefusal and WriterEpoch, unused since the push went (release 6, issue 1945 B8)

internal/link/watched.go

@@ -172,9 +172,6 @@ func (p PowerState) Away() bool { return p.State == "sleeping" || p.State == "sh
 // one it holds (mesh-host `refuseOlder`, novox/hq issue 107): the receiver's refusal S13 counts.
 const StaleRefusal = "is older than what the mesh last said to this node"
 
-// IsStaleRefusal says a report's refusal is the node-engine refusing a declaration older than it holds.
-func IsStaleRefusal(refused string) bool { return strings.Contains(refused, StaleRefusal) }
-
 // A Refusal is one receiver refusing something older than what it holds (novox/hq to-be 45 §6, ADR 0227
 // rule 2): a machine refusing a declaration, or this controller refusing an account.
 type Refusal struct {
@@ -189,15 +186,6 @@ type Refusal struct {
 	At       time.Time
 }
 
-// WriterEpoch is how a refused declaration's writer is said before it is named: by the epoch it
-// claimed, or as a controller that claimed none.
-func WriterEpoch(epoch int64) string {
-	if epoch > 0 {
-		return fmt.Sprintf("the controller of epoch %d", epoch)
-	}
-	return "a controller that claimed no epoch"
-}
-
 // WriterNodeEngine is a machine's node-engine as the writer of an account the controller refused.
 func WriterNodeEngine(node string) string { return "the node-engine on " + node }