feat!: remove messageId from Message and MessageTraits objects (#984)

Author: fmvilas

spec/asyncapi.md

@@ -1227,7 +1227,6 @@ Describes a message received on a given channel and operation.
 
 Field Name | Type | Description
 ---|:---:|---
-<a name="messageObjectMessageId"></a>messageId | `string` | Unique string used to identify the message. The id MUST be unique among all messages described in the API. The messageId value is **case-sensitive**. Tools and libraries MAY use the messageId to uniquely identify a message, therefore, it is RECOMMENDED to follow common programming naming conventions.
 <a name="messageObjectHeaders"></a>headers | [Multi Format Schema Object](#multiFormatSchemaObject) &#124; [Schema Object](#schemaObject) &#124; [Reference Object](#referenceObject) | Schema definition of the application headers. Schema MUST be a map of key-value pairs. It **MUST NOT** define the protocol headers. If this is a [Schema Object](#schemaObject), then the `schemaFormat` will be assumed to be "application/vnd.aai.asyncapi+json;version=`asyncapi`" where the version is equal to the [AsyncAPI Version String](#A2SVersionString).
 <a name="messageObjectPayload"></a>payload | [Multi Format Schema Object](#multiFormatSchemaObject) &#124; [Schema Object](#schemaObject) &#124; [Reference Object](#referenceObject) | Definition of the message payload. If this is a [Schema Object](#schemaObject), then the `schemaFormat` will be assumed to be "application/vnd.aai.asyncapi+json;version=`asyncapi`" where the version is equal to the [AsyncAPI Version String](#A2SVersionString). 
 <a name="messageObjectCorrelationId"></a>correlationId | [Correlation ID Object](#correlationIdObject) &#124; [Reference Object](#referenceObject) | Definition of the correlation ID used for message tracing or matching.
@@ -1248,7 +1247,6 @@ This object MAY be extended with [Specification Extensions](#specificationExtens
 
 ```json
 {
-  "messageId": "userSignup",
   "name": "UserSignup",
   "title": "User signup",
   "summary": "Action to sign a user up.",
@@ -1312,7 +1310,6 @@ This object MAY be extended with [Specification Extensions](#specificationExtens
 ```
 
 ```yaml
-messageId: userSignup
 name: UserSignup
 title: User signup
 summary: Action to sign a user up.
@@ -1360,7 +1357,6 @@ Example using Avro to define the payload:
 
 ```json
 {
-  "messageId": "userSignup",
   "name": "UserSignup",
   "title": "User signup",
   "summary": "Action to sign a user up.",
@@ -1380,7 +1376,6 @@ Example using Avro to define the payload:
 ```
 
 ```yaml
-messageId: userSignup
 name: UserSignup
 title: User signup
 summary: Action to sign a user up.
@@ -1411,7 +1406,6 @@ If you're looking to apply traits to an operation, see the [Operation Trait Obje
 
 Field Name | Type | Description
 ---|:---:|---
-<a name="messageTraitObjectMessageId"></a>messageId | `string` | Unique string used to identify the message. The id MUST be unique among all messages described in the API. The messageId value is **case-sensitive**. Tools and libraries MAY use the messageId to uniquely identify a message, therefore, it is RECOMMENDED to follow common programming naming conventions.
 <a name="messageTraitObjectHeaders"></a>headers | [Multi Format Schema Object](#multiFormatSchemaObject) &#124; [Schema Object](#schemaObject) &#124; [Reference Object](#referenceObject) | Schema definition of the application headers. Schema MUST be a map of key-value pairs. It **MUST NOT** define the protocol headers. If this is a [Schema Object](#schemaObject), then the `schemaFormat` will be assumed to be "application/vnd.aai.asyncapi+json;version=`asyncapi`" where the version is equal to the [AsyncAPI Version String](#A2SVersionString).
 <a name="messageTraitObjectCorrelationId"></a>correlationId | [Correlation ID Object](#correlationIdObject) &#124; [Reference Object](#referenceObject) | Definition of the correlation ID used for message tracing or matching.
 <a name="messageTraitObjectContentType"></a>contentType | `string` | The content type to use when encoding/decoding a message's payload. The value MUST be a specific media type (e.g. `application/json`). When omitted, the value MUST be the one specified on the [defaultContentType](#defaultContentTypeString) field.