cli11 is header-only and the main package is empty. Remove the
dependency to cli11 from cli11-dev so cli11-dev can be included in an
SDK via IMAGE_INSTALL, RDEPENDS, and the like.
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>