remove notebooks from manifest

Author: Jelmer Bot

MANIFEST.in

@@ -5,8 +5,4 @@ include MANIFEST.in
 include requirements.txt
 recursive-include doc *
 recursive-exclude doc/_build *
-recursive-include notebooks *.ipynb *.py
-recursive-include notebooks/data *
-recursive-exclude notebooks/data/generated *
-recursive-exclude notebooks/**/.ipynb_checkpoints *
-recursive-exclude notebooks/images *
+recursive-exclude notebooks *