setup.py: drop data_files, installs LICENSE to incorrect place #287
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As reported in issue
#284, the data_files statement in the setup() calls installs the LICENSE file in the wrong place: in /usr/LICENSE, or even /LICENSE depending on the configuration.
So let's drop this, and let setuptools install the LICENSE file automatically: since setuptools v56, the license_files attribute is automatically assigned to a default value, which includes "LICENSE", so there is in fact nothing to do to the get the LICENSE file installed at the correct location. See
https://setuptools.pypa.io/en/latest/history.html#v56-0-0.