remove edge control

Author: pennam

variants/EDGE_CONTROL/conf/mbed_app.json

@@ -19,9 +19,7 @@
 			"cellular.offload-dns-queries": true,
 			"cellular.at-handler-buffer-size": 1024,
 			"mbed-trace.enable": true,
-			"target.mbed_app_start": "0x10000",
-			"nsapi.dns-response-wait-time": 5000,
-			"nsapi.dns-total-attempts": 3
+			"target.mbed_app_start": "0x10000"
 		},
 		"EDGE_CONTROL": {
 			"sd.SPI_MOSI": "P0_20",