fix: remove custom col for ExposureLevel

Author: jame2O

plugins/MicrosoftDefender/v1/dataStreams/devices.json

@@ -64,12 +64,6 @@
             "shape": "string",
             "role": "label"
         },
-        {
-            "name": "ExposureLevel",
-            "displayName": "Exposure Level",
-            "shape": "string",
-            "role": "label"
-        },
         {
             "name": "OSPlatform",
             "displayName": "OS Platform",