Revert "Add new TCPBufferSize parameter to network"

This reverts commit 57cb1b5aa0.

network/load_balanced_socks5.go

@@ -9,18 +9,13 @@ import (
 )
 
 type loadBalancedSocks5Dialer struct {
-	dialers    []Dialer
-	bufferSize int
+	dialers []Dialer
 }
 
 func (l loadBalancedSocks5Dialer) Dial(network, address string) (net.Conn, error) {
 	return l.DialContext(context.Background(), network, address)
 }
 
-func (l loadBalancedSocks5Dialer) TCPBufferSize() int {
-	return l.bufferSize
-}
-
 func (l loadBalancedSocks5Dialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
 	length := len(l.dialers)
 	start := rand.Intn(length)
@@ -50,7 +45,6 @@ func NewLoadBalancedSocks5Dialer(baseDialer Dialer, proxyURLs []*url.URL) (Diale
 	}
 
 	return loadBalancedSocks5Dialer{
-		dialers:    dialers,
-		bufferSize: baseDialer.TCPBufferSize(),
+		dialers: dialers,
 	}, nil
 }