Delete hr file after install expansion
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 @Christoph-Hart Could we have an option to automatically delete hr files after installing an expansion using installExpansionFromPackage?
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 +1 i haven't checked yet but is there an uninstall/remove expansion available? If not that would be neat too :) 
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 @iamlamprey There is for the manual installer but there doesn't seem to be one for the script command. 
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 @d-healey You can do this using the file and file system APIs. 
