diff --git a/gatchat/ppp_auth.c b/gatchat/ppp_auth.c
index 77fa06d2..e04f708d 100644
--- a/gatchat/ppp_auth.c
+++ b/gatchat/ppp_auth.c
@@ -163,8 +163,6 @@ static void chap_process_packet(struct auth_data *data, guint8 *new_packet)
 
 static void chap_free(struct auth_data *auth)
 {
-	/* TBD unregister protocol handler */
-
 	g_free(auth->proto_data);
 }
 
diff --git a/gatchat/ppp_ipcp.c b/gatchat/ppp_ipcp.c
index 394001e4..661ffa8b 100644
--- a/gatchat/ppp_ipcp.c
+++ b/gatchat/ppp_ipcp.c
@@ -225,8 +225,6 @@ void ipcp_free(struct pppcp_data *data)
 {
 	struct ipcp_data *ipcp = data->priv;
 
-	/* TBD unregister IPCP packet handler */
-
 	/* free ipcp */
 	g_free(ipcp);
 
diff --git a/gatchat/ppp_lcp.c b/gatchat/ppp_lcp.c
index 76c6759b..78407d41 100644
--- a/gatchat/ppp_lcp.c
+++ b/gatchat/ppp_lcp.c
@@ -211,8 +211,6 @@ void lcp_free(struct pppcp_data *lcp)
 	if (lcp == NULL)
 		return;
 
-	/* TBD unregister packet handler */
-
 	pppcp_free(lcp);
 }
 
diff --git a/gatchat/ppp_net.c b/gatchat/ppp_net.c
index 908da84f..f59cbbc6 100644
--- a/gatchat/ppp_net.c
+++ b/gatchat/ppp_net.c
@@ -158,8 +158,6 @@ struct ppp_net_data *ppp_net_new(GAtPPP *ppp)
 
 void ppp_net_free(struct ppp_net_data *data)
 {
-	/* TBD unregister packet handler */
-
 	/* cleanup tun interface */
 	ppp_net_close(data);