I'm writing a detailed review article (for submission for publication) that aims to survey the various proposed explanations for a particular biological phenomenon. I'm aware of one explanation (that was proposed 20+ years ago), but a number of papers since then have pointed out fatal flaws in its logic. The original paper was published in a respectable journal and has been relatively well cited, since many papers on this phenomenon include some form of survey of the proposed hypotheses. However, it has not received any (published) support, experimental or otherwise.
At what point can we, as researchers in the field, consider the matter closed, and cease to refer to the refuted hypothesis? It seems a waste of space to spend a paragraph detailing one argument, only to spend the next paragraph explaining why it is flawed, and then not referring to it again. On the other hand, does it damage the credibility of my review if I omit one of the hypotheses without any justification?