remove favicon from docs dockerfile

Author: rmorshea

docs/Dockerfile

@@ -21,7 +21,6 @@ ADD setup.py ./
 ADD setup.cfg ./
 ADD MANIFEST.in ./
 ADD README.md ./
-ADD idom/client/app/favicon.ico ./
 
 RUN pip install -e .[all]
 RUN python -m idom install victory semantic-ui-react @material-ui/core