Don't provide default interface on NCS36510, won't fit testcases on IAR

targets/targets.json

@@ -4101,10 +4101,7 @@
         "macros": ["CM3", "CPU_NCS36510", "TARGET_NCS36510", "LOAD_ADDRESS=0x3000"],
         "supported_toolchains": ["GCC_ARM", "ARM", "IAR"],
         "device_has": ["ANALOGIN", "SERIAL", "I2C", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "TRNG", "SPISLAVE", "802_15_4_PHY"],
-        "release_versions": ["2", "5"],
-        "overrides": {
-            "network-default-interface-type": "MESH"
-        }
+        "release_versions": ["2", "5"]
     },
     "NUMAKER_PFM_M453": {
         "core": "Cortex-M4F",

tools/test_configs/target_configs.json

@@ -42,9 +42,5 @@
     "NUCLEO_F401RE": {
         "default_test_configuration": "NONE",
         "test_configurations": ["IDW0XX1_WIFI"]
-    },
-    "NCS36510": {
-        "default_test_configuration": "6LOWPAN_HOST",
-        "test_configurations": ["6LOWPAN_HOST", "6LOWPAN_ROUTER", "THREAD_ROUTER", "THREAD_END_DEVICE"]
     }
 }