delete dma code for esp8266
@@ -432,9 +432,6 @@ at_config at_user_conf =
.buardrate = AT_BUARDRATE,
.linkid_num = AT_MAX_LINK_NUM,
.user_buf_len = MAX_AT_USERDATA_LEN,
-#ifdef USE_USARTRX_DMA
- .recv_buf_len = MAX_AT_RECV_LEN,
-#endif
.cmd_begin = AT_CMD_BEGIN,
.line_end = AT_LINE_END,
.mux_mode = 1, //support multi connection mode
