P2p: comment out dead code

src/.merlin

@@ -33,7 +33,6 @@ PKG dynlink
 PKG ezjsonm
 PKG git
 PKG git-unix
-PKG ipv6-multicast
 PKG irmin-unix
 PKG irmin-git
 PKG irmin

src/Makefile.files

@@ -309,7 +309,6 @@ NODE_PACKAGES := \
   cohttp.lwt \
   dynlink \
   git \
-  ipv6-multicast \
   irmin-unix \
   ocplib-resto.directory \
   ssl \

src/node/net/p2p_discovery.ml

@@ -17,6 +17,7 @@ let shutdown () = Lwt.return_unit
 
 let inet_addr = Unix.inet_addr_of_string "ff0e::54:455a:3053"
 
+(*
 module Message = struct
 
   let encoding =
@@ -61,7 +62,6 @@ let create_socket (iface, disco_addr, disco_port) =
   Ipv6_multicast.Unix.membership ?iface usock disco_addr `Join ;
   iface, sock, saddr
 
-(*
 module Answerer = struct
 
   (* Launch an answer machine for the discovery mechanism, takes a

src/tezos-deps.opam

@@ -22,7 +22,6 @@ depends: [
   "ezjsonm" {>= "0.5.0" }
   "git"
   "git-unix"
-  "ipv6-multicast"
   "irmin" {>= "1.3" }
   "irmin-unix"
   "lwt" {>= "3.0.0" }