not entirely sure what you mean. On the AMQP Message, you can decide youself which meta data to put on. Same as the Axon meta-data, actually, by configuring CorrelationDataProviders. By default, the MessageOriginProvider is configured. To change that, all you need to do is define another provider (for example one that returns an empty map). Once a CorrelationDataProvider is configured, Axon doesn’t configure the default.
So if you’re on Spring boot, define a bean that provides a SimpleCorrelationDataProvider that was initialized without any meta-data keys.