Docker: remove non-required dev.packages.vyos.net repo

Debian Buster ships all required packages and thus we do not need to fallback
to dev.packages.vyos.net for help.

docker/Dockerfile

@@ -182,14 +182,6 @@ RUN export RTRLIB_VERSION="0.6.3" && \
     cd /tmp/rtrlib-${RTRLIB_VERSION} && dpkg-buildpackage -uc -us -tc -b && \
     dpkg -i ../librtr*_amd64.deb ../librtr*_all.deb
 
-#
-# Setup VyOS Debian repository
-#
-COPY vyos-dev.key /tmp/vyos-dev.key
-RUN apt-key add /tmp/vyos-dev.key
-RUN echo "deb http://dev.packages.vyos.net/repositories/current/debian/ current main" \
-      > /etc/apt/sources.list.d/vyos.list
-
 # Packages needed to build frr itself
 # libyang-dev packages are hsoted on dev.packages.vyos.net see
 # https://github.com/FRRouting/frr/blob/master/doc/developer/building-libyang.rst
@@ -205,11 +197,6 @@ RUN apt-get update && apt-get install -y \
       python3-pytest \
       texinfo
 
-#
-# Cleanup VyOS Debian Repository
-#
-RUN rm -f /etc/apt/sources.list.d/vyos.list
-
 # Packages needed for conntrack-tools
 RUN apt-get update && apt-get install -y \
       libnetfilter-conntrack-dev \

docker/vyos-dev.key

@@ -1,32 +0,0 @@
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