Etelemetry is pinged when building docs

[effigies]

building [mo]: targets for 0 po files that are out of date
building [html]: targets for 71 source files that are out of date
updating environment: [new config] 352 added, 0 changed, 0 removed
/home/cjmarkie/anaconda3/envs/nipype-dev/lib/python3.8/site-packages/dipy/viz/__init__.py:21: UserWarning: You do not have FURY installed. Some visualization functions might not work for you. For installation instructions, please visit: https://fury.gl/
  warnings.warn(
/home/cjmarkie/anaconda3/envs/nipype-dev/lib/python3.8/site-packages/dipy/stats/__init__.py:7: UserWarning: The `dipy.stats` module is still under heavy development and functionality, as well as the API is likely to change in future versions of the software
  warnings.warn(w_string)
200223-11:58:47,169 nipype.utils INFO:d/nipype.interfaces.matlab
	 Running nipype version 1.5.0-dev (latest: 1.4.2)
reading sources... [100%] version

We should probably add a NO_ET environment variable in conf.py.