Revert "fix(api): market/combined_streams: Get Proxy form Environment (#879)" (#985)

This reverts commit 183e9273b889a3206a917887f0535526d6e48f59.

market/combined_streams.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 	"sync"
 	"time"
-	"net/http"
 
 	"github.com/gorilla/websocket"
 )
@@ -33,7 +32,6 @@ func NewCombinedStreamsClient(batchSize int) *CombinedStreamsClient {
 func (c *CombinedStreamsClient) Connect() error {
 	dialer := websocket.Dialer{
 		HandshakeTimeout: 10 * time.Second,
-		Proxy           : http.ProxyFromEnvironment,
 	}
 
 	// 组合流使用不同的端点