fix: dont blindly add observed addresses to our list (libp2p#337)

Until we can properly validate the observed address our
peer tells us about, we shouldnt blindly add it to our
address list. Until we have better NAT management we cant
reliably validate that we're adding an appropriate address
for ourselves.

src/connection/manager.js

@@ -179,12 +179,7 @@ class ConnectionManager {
               })
             }
 
-            const { peerInfo, observedAddrs } = results
-
-            for (var i = 0; i < observedAddrs.length; i++) {
-              var addr = observedAddrs[i]
-              this.switch._peerInfo.multiaddrs.addSafe(addr)
-            }
+            const { peerInfo } = results
 
             if (peerInfo) {
               conn.setPeerInfo(peerInfo)