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If you do a kickstart install with a kickstart file containing the line
%packages --resolvedeps
you get the warning 

The --resolvedeps option was removed in version F9, but you are using kickstart syntax version DEVEL.

This makes sense in a Fedora context, but it might puzzle someone on RHEL.

F9 came before RHEL6, and the option was removed in F9.  Therefore it does make sense to display this error message.