Dropping duplicate "using namespace mbed;"

Veijo Pesonen · Veijo Pesonen · commit 95511bc7ebd8 · 2018-11-22T15:57:33.000+02:00
diff --git a/components/wifi/esp8266-driver/ESP8266/ESP8266.cpp b/components/wifi/esp8266-driver/ESP8266/ESP8266.cpp
@@ -27,8 +27,6 @@
 
 #define TRACE_GROUP  "ESPA" // ESP8266 AT layer
 
-using namespace mbed;
-
 #define ESP8266_DEFAULT_BAUD_RATE   115200
 #define ESP8266_ALL_SOCKET_IDS      -1
 
