DPL-nnn Possible redundant fact creation in actions.rb

[JamesGlover]

Describe the Housekeeping

When running some of the rubocop auto-fixes, I noticed this:
https://github.com/sanger/samples_extraction/blob/f2d8d3ebc9658bbcb64128402014dd5db7b08193/app/models/action.rb#L86-L90

The yielded asset is unused, and instead assets gets passed into `each_connected_asset. This will need to be evaluated to make sure we aren't creating asset*asset facts unnecessarily. It can then either be fixed, or annotated with a clear explanation.

Blocking issues
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Additional context
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