Fix wireguard not discarding broken connection on android (#5304)

* fix wireguard not discarding broken connection on android

* simplify error checking

proxy/wireguard/bind.go

@@ -3,7 +3,6 @@ package wireguard
 import (
 	"context"
 	"errors"
-	"io"
 	"net"
 	"net/netip"
 	"strconv"
@@ -153,7 +152,7 @@ func (bind *netBindClient) connectTo(endpoint *netEndpoint) error {
 			v.endpoint = endpoint
 			v.err = err
 			v.waiter.Done()
-			if err != nil && errors.Is(err, io.EOF) {
+			if err != nil {
 				endpoint.conn = nil
 				return
 			}