I don't think it's fair to say "no evidence".

One of the definitions of "evidence" is (from http://www.dictionary.com/browse/evidence):

something that makes plain or clear; an indication or sign:

Example: His flushed look was visible evidence of his fever.

What indications or signs are there in this case (within the emails, in Pizzagate)? Well, I wouldn't call all of the pictures found on that guy, Alefantis', Instagram "normal", by any means, to seriously understate it. Could certainly be a sign of something (off), in itself.

That being said, there aren't really any substantiative facts, of the "jail-able variety", tied to Pizzagate, at least, as far as I know, which is admittedly very little. So, in light of these two observations, I think it's more accurate to refer to this whole case as having "weak" (as opposed to "no") evidence.