don't need external in CI, compressed docker image is 50MB smaller

old-commit-hash: 2063a370d3

Dockerfile.openpilot

@@ -61,7 +61,6 @@ RUN cd /tmp && pipenv install --system --deploy
 # Install subset of dev dependencies needed for CI
 RUN pip install matplotlib==3.1.1 dictdiffer==0.8.0 fastcluster==1.1.25 aenum==2.2.1 lru-dict==1.1.6 scipy==1.4.1 tenacity==5.1.1 azure-common==1.1.23 azure-nspkg==3.0.2 azure-storage-blob==2.1.0 azure-storage-common==2.1.0 azure-storage-nspkg==3.1.0 pycurl==7.43.0.3 coverage==5.1
 
-ENV PATH="/tmp/openpilot/external/bin:${PATH}"
 ENV PYTHONPATH /tmp/openpilot:${PYTHONPATH}
 
 RUN mkdir -p /tmp/openpilot
@@ -70,7 +69,6 @@ COPY ./flake8_openpilot.sh ./pylint_openpilot.sh ./.pylintrc ./.coveragerc-app /
 
 COPY ./pyextra /tmp/openpilot/pyextra
 COPY ./phonelibs /tmp/openpilot/phonelibs
-COPY ./external /tmp/openpilot/external
 COPY ./laika /tmp/openpilot/laika
 COPY ./laika_repo /tmp/openpilot/laika_repo
 COPY ./rednose /tmp/openpilot/rednose