Do not log subscription conninfo.

Logging connection information, even at DEBUG1, creates unnecessary
risks. Remove the entire log message because it had no other useful
content.

Addresses finding 14 in report from linked discussion.

Reported-by: Noah Misch <noah@leadboat.com>
Discussion: https://postgr.es/m/20260710195902.4f.noahmisch@microsoft.com
Backpatch-through: 14

src/backend/replication/logical/worker.c

@@ -3194,10 +3194,6 @@ ApplyWorkerMain(Datum main_arg)
 
 	CommitTransactionCommand();
 
-	/* Connect to the origin and start the replication. */
-	elog(DEBUG1, "connecting to publisher using connection string \"%s\"",
-		 MySubscription->conninfo);
-
 	if (am_tablesync_worker())
 	{
 		char	   *syncslotname;