sticky_remover.py

from pptx import Presentation
from pptx.shapes.autoshape import Shape
from pptx.enum.dml import MSO_LINE
from os import listdir, path

source = path.join(".", "source")
dist = path.join(".", "dist")

for file in listdir(source):
    prs = Presentation(path.join(source, file))
    for slide in prs.slides:
        for shape in slide.shapes:
            if isinstance(shape, Shape):
                shape.fill.background()
    prs.save(path.join(dist, file))