Obviously not. To begin, no religion I’m aware of would preclude informing the patient in that circumstance. And few libertarians believe that individual freedom requires allowing deception of others, as in your hypothetical.
Apart from that, weighing individual liberty interests is always context-dependent. E.g. consider the various wrinkles when it comes to self defense. For a libertarian, forcing doctors to perform a procedure that involves killing something (whatever you think that thing is) in non-emergency circumstances just because that might leave too few people in an area willing to do that probably falls too far on the side of ignoring individual liberty. It’s the basic libertarian position: you may have a right to something, but you don’t have a right to make someone else give you that thing.
And, of course, since the doctor is also an active participant in killing the fetus, it’s not the “doctor imposing morals in the patient.”