Traditional witchcraft can be somewhat eclectic incorporating christian, heretical, native polytheist, and classical polytheism in addition to ideas gained through cultural exchange throughout the generations of the tradition.
In these postmodern times, polytheist reconstruction is growing, and traditional witches may incorporate some aspects of reconstruction into their craft. However, traditional witchcraft isn’t particularly reconstructionist in nature. Considering the procedure of polytheist reconstruction is so new, it wouldn’t make sense for practices stemming from before the postmodern period to have that structure.
(I shouldn’t leave out that alternatively to Christian, other major religions likewise influence(d) forms of traditional witchcraft).