docker: don't move .egg_info files anymore:

moving `.egg_info` cause trouble, and doesn't seem necessary anymore.

docker/libervia-web-dev/Dockerfile

@@ -12,8 +12,7 @@ RUN apt-get install -y --no-install-recommends yarnpkg
 WORKDIR /home/libervia
 USER libervia
 RUN cd /src && hg clone https://repos.goffi.org/libervia-web -u "${REVISION:-@}" && \
-    ~/libervia_env/bin/pip install -e libervia-web && \
-    mv libervia-web/libervia_web.egg-info ~/libervia_env/lib/python3.*/site-packages
+    ~/libervia_env/bin/pip install -e libervia-web
 
 RUN ./entrypoint.sh \
     # we build here to avoid re-downloading node modules or other browser