fix metadata

pkg/listener/http2/metadata.go

@@ -1,9 +1,6 @@
 package http2
 
 import (
-	"net/http"
-	"time"
-
 	mdata "github.com/go-gost/gost/pkg/metadata"
 )
 
@@ -12,24 +9,12 @@ const (
 )
 
 type metadata struct {
-	path              string
-	handshakeTimeout  time.Duration
-	readHeaderTimeout time.Duration
-	readBufferSize    int
-	writeBufferSize   int
-	enableCompression bool
-	responseHeader    http.Header
-	backlog           int
+	backlog int
 }
 
 func (l *http2Listener) parseMetadata(md mdata.Metadata) (err error) {
 	const (
-		path              = "path"
-		handshakeTimeout  = "handshakeTimeout"
-		readHeaderTimeout = "readHeaderTimeout"
-		readBufferSize    = "readBufferSize"
-		writeBufferSize   = "writeBufferSize"
-		backlog           = "backlog"
+		backlog = "backlog"
 	)
 
 	l.md.backlog = mdata.GetInt(md, backlog)