Drop deprecated python requirements

Author: ianfixes

Dockerfile

@@ -46,11 +46,9 @@ RUN true \
  g++ \
  time \
  jq \
- python \
- python-yaml \
- python-pip \
  python3 \
  python3-pip \
+ python3-yaml \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/* \
  && pip install pyserial \