Minor cleanups.

rtpconn/rtpconn.go

@@ -410,7 +410,6 @@ type rtpUpTrack struct {
 	srTime        uint64
 	srNTPTime     uint64
 	srRTPTime     uint32
-	maxLayer      uint8
 	local         []conn.DownTrack
 	bufferedNACKs []uint16
 	actions       []trackAction

rtpconn/webclient.go

@@ -165,7 +165,7 @@ func addUpConn(c *webClient, id, label string, offer string) (*rtpUpConnection,
 		c.up = make(map[string]*rtpUpConnection)
 	}
 	if c.down != nil && c.down[id] != nil {
-		return nil, false, errors.New("Adding duplicate connection")
+		return nil, false, errors.New("adding duplicate connection")
 	}
 
 	old := c.up[id]