Revert "fix: close event was not triggered reliably (#860)"

This reverts commit ec1d5ae, reversing
changes made to 8816f54.

Author: jonasgloning

lib/negotiator.ts

@@ -113,7 +113,6 @@ export class Negotiator {
 						"iceConnectionState changed to disconnected on the connection with " +
 							peerId,
 					);
-					this.connection.close();
 					break;
 				case "completed":
 					peerConnection.onicecandidate = util.noop;

lib/peer.ts

@@ -491,9 +491,6 @@ export class Peer extends EventEmitter<PeerEvents> {
 
 			if (index !== -1) {
 				connections.splice(index, 1);
-				if (connections.length <= 0) {
-					this._connections.delete(connection.peer);
-				}
 			}
 		}