Remove documentation for unused field

Author: mxsrc

chart/values.schema.json

@@ -30,20 +30,6 @@
     "issuer": {
       "type": "string"
     },
-    "db": {
-      "type": "object",
-      "properties": {
-        "service": {
-          "type": "object",
-          "properties": {
-            "externalEnabled": {
-              "type": "boolean",
-              "description": "Expose the Postgres service externally. Disable for clusters without external IPv6 support."
-            }
-          }
-        }
-      }
-    },
     "prometheus": {
       "type": "object",
       "required": ["name", "namespace"],