style: remove unused code

Author: purofle

app/src/main/java/io/nekohasekai/sagernet/fmt/v2ray/StandardV2RayBean.java

@@ -229,7 +229,6 @@ public void deserialize(ByteBufferInput input) {
             input.setPosition(position); // 读后归位
 
             if (tmpPacketEncoding != 1 && tmpPacketEncoding != 2) {
-                input.getByteBuffer().position(position);
                 enableECH = tmpEnableECH;
                 if (enableECH) {
                     enablePqSignature = input.readBoolean();