Remove the IntentResolution.version field as defunct

[kriswest]

resolves #1053

Removed the version field from IntentResolution as there are no version fields for intents in the FDC3 API definitions and hence the field has no purpose.

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[bingenito]

Does this need to be explicitly removed from markdown too?

https://github.com/finos/FDC3/blob/master/docs/api/ref/Metadata.md?plain=1#L324

[kriswest]

@bingenito Yes it does. You'd think I'd know how to do this by now 🤦‍♂️

[kriswest]

@bingenito fixed the docs reference, and a schema reference to the field that had made it into bridging.