The documentation implies that LicenseUrl can be set to nothing to disable the license link and checkbox but the schema doesn't allow this. As a workaround you can set LicenseUrl=" " (a single space).
Are you talking about the bal:WixStandardBootstrapperApplication element?
Yes I am.
Code I use to achieve this is as follows:
<bal:WixStandardBootstrapperApplication LicenseUrl=" " />