contrib/pylightning: remove lightning-pay helper.

This example predates the pay plugin!  It's obsolete, unmaintained,
and probably doesn't work.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

contrib/pylightning/setup.py

@@ -19,6 +19,5 @@ setup(name='pylightning',
       author_email='decker.christian@gmail.com',
       license='MIT',
       packages=['lightning'],
-      scripts=['lightning-pay'],
       zip_safe=True,
       install_requires=requirements)