osmo_mdns_rfc_record/question_encode: remove ctx

Remove the ctx argument to both functions, as it's not used anymore.

Related: OS#5821
Change-Id: I5e3dd18bf08f7aa42f49c262e13250778ea0c6a2
diff --git a/src/mslookup/mdns_rfc.c b/src/mslookup/mdns_rfc.c
index 7bfd328..8a8cdec 100644
--- a/src/mslookup/mdns_rfc.c
+++ b/src/mslookup/mdns_rfc.c
@@ -69,7 +69,7 @@
 /*! Encode question section (RFC 1035 4.1.2).
  * \param[in] msgb  mesage buffer to which the encoded data will be appended.
  */
-int osmo_mdns_rfc_question_encode(void *ctx, struct msgb *msg, const struct osmo_mdns_rfc_question *qst)
+int osmo_mdns_rfc_question_encode(struct msgb *msg, const struct osmo_mdns_rfc_question *qst)
 {
 	uint8_t *buf;
 	size_t buf_len;
@@ -125,7 +125,7 @@
 /*! Encode one resource record (RFC 1035 4.1.3).
  * \param[in] msgb  mesage buffer to which the encoded data will be appended.
  */
-int osmo_mdns_rfc_record_encode(void *ctx, struct msgb *msg, const struct osmo_mdns_rfc_record *rec)
+int osmo_mdns_rfc_record_encode(struct msgb *msg, const struct osmo_mdns_rfc_record *rec)
 {
 	uint8_t *buf;
 	size_t buf_len;