MINOR: proto_htx: Don't stop forwarding when there is a post-connect processing

The TXN flag HTTP_MSGF_WAIT_CONN is now ignored on HTX streams. There is no
reason to not start to forward data in HTX. This is required for the legacy mode
and this was copied from it during the HTX development. But it is simply
useless.
diff --git a/src/proto_htx.c b/src/proto_htx.c
index 9f3a4d9..89e4284 100644
--- a/src/proto_htx.c
+++ b/src/proto_htx.c
@@ -1185,20 +1185,6 @@
 	if (msg->msg_state == HTTP_MSG_BODY)
 		msg->msg_state = HTTP_MSG_DATA;
 
-	/* Some post-connect processing might want us to refrain from starting to
-	 * forward data. Currently, the only reason for this is "balance url_param"
-	 * whichs need to parse/process the request after we've enabled forwarding.
-	 */
-	if (unlikely(msg->flags & HTTP_MSGF_WAIT_CONN)) {
-		if (!(s->res.flags & CF_READ_ATTACHED)) {
-			channel_auto_connect(req);
-			req->flags |= CF_WAKE_CONNECT;
-			channel_dont_close(req); /* don't fail on early shutr */
-			goto waiting;
-		}
-		msg->flags &= ~HTTP_MSGF_WAIT_CONN;
-	}
-
 	/* in most states, we should abort in case of early close */
 	channel_auto_close(req);