Download and install the latest patch, which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.
For all previous versions, you can accomplish this by setting the country's Address Format to "United Kingdom". This address format does not require State/Province on BBIS forms.
To do this, navigate to Administration > Countries and States, scroll down to the Country that should not require State/Province, then expand it and click Edit. On the Edit Country screen, change the "Address Format" drop-down to "United Kingdom", then click Save. Now State/Province will not be required, and the rest of the Country's properties will remain the same.
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