fix(accounting): remove invalid type from parameter reference

The /Accounts path parameter reference included a sibling type property, which is not allowed on an OpenAPI 3.0 Reference Object and caused strict validators to reject the specification.

Remove the redundant property while retaining the shared requiredHeader parameter definition.

Fixes #694

Author: KSHITIZ6341

xero_accounting.yaml

@@ -14,7 +14,6 @@ paths:
   /Accounts:
     parameters:
       - $ref: "#/components/parameters/requiredHeader"
-        type: string
     get:
       security:
         - OAuth2: