De-duplicate mod files in examples

[sanjayankur31]

We seem to have duplicates of mod files in some of the examples which waste some resources (bandwidth + diskspace on mirrors etc.), so it'll be good to de-duplicate them if possible. Came up in the Fedora Linux review:

python-neurotune-doc.noarch: E: files-duplicated-waste 416067
python-neurotune-doc.noarch: W: files-duplicate /usr/share/doc/python-neurotune-doc/examples/example_2/100pA_1.csv /usr/share/doc/python-neurotune-doc/examples/example_1/100pA_1.csv
python-neurotune-doc.noarch: W: files-duplicate /usr/share/doc/python-neurotune-doc/examples/example_2/Kv_3_erisir_99.mod /usr/share/doc/python-neurotune-doc/examples/example_1/Kv_3_erisir_99.mod
python-neurotune-doc.noarch: W: files-duplicate /usr/share/doc/python-neurotune-doc/examples/example_2/kv_1.mod /usr/share/doc/python-neurotune-doc/examples/example_1/kv_1.mod
python-neurotune-doc.noarch: W: files-duplicate /usr/share/doc/python-neurotune-doc/examples/example_2/na.mod /usr/share/doc/python-neurotune-doc/examples/example_1/na.mod

https://bugzilla.redhat.com/show_bug.cgi?id=2026389