fixup setup.py; doesn't need json

setup.py

@@ -1,7 +1,3 @@
-# depends upon:
-# - requests
-# - pytz
-# - json
 
 import setuptools
 
@@ -16,7 +12,7 @@ setuptools.setup(
     description="Python bindings for fulcrm - https://fulcrm.org/",
     long_description=long_description,
     long_description_content_type="text/markdown",
-    install_requires=['requests>=2.21.0', 'pytz', 'json>=2.0.9'],
+    install_requires=['requests>=2.21.0', 'pytz'],
     url="https://gitea.faelix.net/FAELIX/fulcrmpy",
     packages=setuptools.find_packages(),
     classifiers=[