Remove MAC tester related code

tools/test_configs/MACTester.json

@@ -1,50 +0,0 @@
-{
-    "config": {
-        "radio-type":{
-            "help": "options are ATMEL, MCR20, OTHER",
-            "value": "ATMEL"
-        },
-        "header-file": {
-            "help" : "String for including your driver header file",
-            "value" : "\"EthernetInterface.h\""
-        },
-        "object-construction" : {
-            "value" : "new EthernetInterface()"
-        },
-        "connect-statement" : {
-            "help" : "Must use 'net' variable name",
-            "value" : "net->connect()"
-        },
-        "echo-server-addr" : {
-            "help" : "IP address of echo server",
-            "value" : "\"echo.mbedcloudtesting.com\""
-        },
-        "echo-server-port" : {
-            "help" : "Port of echo server",
-            "value" : "7"
-        },
-        "tcp-echo-prefix" : {
-            "help" : "Some servers send a prefix before echoed message",
-            "value" : null
-        },
-        "sim-blockdevice": {
-            "help": "Simulated block device, requires sufficient heap",
-            "macro_name": "MBED_TEST_SIM_BLOCKDEVICE",
-            "value": "HeapBlockDevice"
-        }
-    },
-    "macros": ["MBED_TRACE_LINE_LENGTH=200", "OS_TASKCNT=4", "OS_IDLESTKSIZE=32"],
-    "target_overrides": {
-        "*": {
-            "nanostack.configuration": "lowpan_host",
-            "platform.stdio-convert-newlines": true,
-            "platform.stdio-baud-rate": 115200,
-            "mbed-mesh-api.heap-size": 6000,
-            "nanostack-hal.event_loop_thread_stack_size": 2000,
-            "mbed-trace.enable": true,
-            "nsapi.default-stack": "LWIP",
-            "target.device_has_add": ["802_15_4_PHY"],
-            "atmel-rf.provide-default": true
-        }
-    }
-}

tools/test_configs/config_paths.json

@@ -13,5 +13,4 @@
     "6LOWPAN_ROUTER" : "6lowpanInterface_router.json",
     "THREAD_END_DEVICE" : "ThreadInterface_end_device.json",
     "THREAD_ROUTER" : "ThreadInterface_router.json"
-    "MAC_TESTER" : "MACTester.json"
 }