chore(openapi.json): remove deprecated AttemptState and associated fields from schema

This commit removes the deprecated `AttemptState` object and associated fields from the OpenAPI schema, including the `state` field within the `EventAttempt` object. The `AttemptStatus` object is now used to represent the attempt status, consolidating the state and status information.

Author: fern-api[bot]

openapi.json

@@ -464,14 +464,6 @@
         ],
         "description": "Attempt status"
       },
-      "AttemptState": {
-        "type": "string",
-        "enum": [
-          "COMPLETED"
-        ],
-        "nullable": true,
-        "x-docs-hide": true
-      },
       "EventAttempt": {
         "type": "object",
         "properties": {
@@ -547,9 +539,6 @@
           "status": {
             "$ref": "#/components/schemas/AttemptStatus"
           },
-          "state": {
-            "$ref": "#/components/schemas/AttemptState"
-          },
           "successful_at": {
             "type": "string",
             "format": "date-time",