So are you saying that you want to run forms on weblogic but not install the component that actually serves and execute the forms?
From a forms point of view isn't this like building a car without an engine and then wanting it to work as if it had one?
Maybe I've misunderstood your question.
install WebLogic Server alone on the server and then configure it to run a Forms application, without having to install Forms 11g on the application server machine.
Back in the old Forms 6i days: was it possible to run Forms 6i without having to install the 6i Forms Runtime? The very same answer applies to your question.