Drop redundant shared groupId to satisfy automerge linter (DCTL1031)

Author: darbymanning

postboi.email.dkim.json

@@ -13,21 +13,18 @@
 	"hostRequired": false,
 	"records": [
 		{
-			"groupId": "dkim",
 			"type": "CNAME",
 			"host": "%dkim1%._domainkey",
 			"pointsTo": "%dkim1%.dkim.amazonses.com",
 			"ttl": 3600
 		},
 		{
-			"groupId": "dkim",
 			"type": "CNAME",
 			"host": "%dkim2%._domainkey",
 			"pointsTo": "%dkim2%.dkim.amazonses.com",
 			"ttl": 3600
 		},
 		{
-			"groupId": "dkim",
 			"type": "CNAME",
 			"host": "%dkim3%._domainkey",
 			"pointsTo": "%dkim3%.dkim.amazonses.com",