remove unneeded git package on Dockerfile (no more needed)

Author: Davide Moro

{{cookiecutter.project_slug}}/Dockerfile

@@ -7,9 +7,5 @@ RUN pip3 install --upgrade pip \
         setuptools \
         tox
 
-# TODO: remove me when pypom_navigation will be released
-RUN apk add --no-cache git && \
-    rm -fR /root/.cache
-
 ENTRYPOINT [ "tox"]
 CMD ["-epy36",  "--", "-vvv", "--splinter-webdriver=remote", "--variables=credentials_template.yml", "--splinter-remote-url=http://{{cookiecutter.browserstack_username}}:{{cookiecutter.browserstack_access_key}}@hub.browserstack.com:80/wd/hub", "--variables=capabilities/WIN10-FIREFOX53.json"]