Remove :doc false since there is a doc string

[jorinvo]

Hi there! Thank you for this excellent library!
I just came across this over here and was wondering if there is any reason behind having a docstring plus {:doc false} metadata. If this is simply some left over, I'm happy to have this merged. Otherwise feel free to close this MR. Thanks :)

[martinklepsch]

It could be the intention behind these {:doc false} flags is what you'd usually do with ^:no-doc, i.e. hiding them from documentation. Maybe it would make sense to add ^:no-doc in exchange for deleting the {:doc false} lines.