remove duplicate prototypes. Have not checked if there are more.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@44875 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -1267,8 +1267,6 @@ static enum check_auth_result check_user_full(struct sip_pvt *p, struct sip_requ
 					      int sipmethod, char *uri, enum xmittype reliable,
 					      struct sockaddr_in *sin, struct sip_peer **authpeer);
 static int check_user(struct sip_pvt *p, struct sip_request *req, int sipmethod, char *uri, enum xmittype reliable, struct sockaddr_in *sin);
-static int do_proxy_auth(struct sip_pvt *p, struct sip_request *req, char *header, char *respheader, int sipmethod, int init);
-static int build_reply_digest(struct sip_pvt *p, int method, char* digest, int digest_len);
 /*--- Domain handling */
 static int check_sip_domain(const char *domain, char *context, size_t len); /* Check if domain is one of our local domains */