Remove company_id from conversation response schema

The company_id field is not returned by the API in conversation
responses, so it should not be in the conversation schema.

Note: company_id in update_conversation_request schema is preserved
as it is correctly used in PUT request bodies.

Author: adisan19

descriptions/0/api.intercom.io.yaml

@@ -17951,11 +17951,6 @@ components:
           description: The id of the team assigned to the conversation. If it's not
             assigned to a team it will return null.
           example: '5017691'
-        company_id:
-          type: string
-          description: The ID of the company that the conversation is associated with.
-            The unique identifier for the company which is given by Intercom.
-          example: 5f4d3c1c-7b1b-4d7d-a97e-6095715c6632
         company:
           "$ref": "#/components/schemas/company"
           nullable: true

descriptions/2.14/api.intercom.io.yaml

@@ -16725,11 +16725,6 @@ components:
           description: The id of the team assigned to the conversation. If it's not
             assigned to a team it will return null.
           example: '5017691'
-        company_id:
-          type: string
-          description: The ID of the company that the conversation is associated with.
-            The unique identifier for the company which is given by Intercom.
-          example: 5f4d3c1c-7b1b-4d7d-a97e-6095715c6632
         tags:
           "$ref": "#/components/schemas/tags"
         conversation_rating:

descriptions/2.15/api.intercom.io.yaml

@@ -17381,11 +17381,6 @@ components:
           description: The id of the team assigned to the conversation. If it's not
             assigned to a team it will return null.
           example: '5017691'
-        company_id:
-          type: string
-          description: The ID of the company that the conversation is associated with.
-            The unique identifier for the company which is given by Intercom.
-          example: 5f4d3c1c-7b1b-4d7d-a97e-6095715c6632
         company:
           "$ref": "#/components/schemas/company"
           nullable: true