Remove FlexRAN

- Remove any FlexRAN code
- Cleanup config files
- Remove LFDS7, libyaml dependencies

docker/Dockerfile.base.rhel8.2

@@ -52,9 +52,7 @@ RUN rm -f /etc/rhsm-host && \
        psmisc \
        git \
        # python3-pip and pyyaml are used for conf template generation
-       python3-pip \
-       #unzip is needed for protobuf
-       unzip && \
+       python3-pip && \
     pip3 install --ignore-installed pyyaml && \
     echo "/usr/local/lib" > /etc/ld.so.conf.d/local-lib.conf && \
     echo "/usr/local/lib64" >> /etc/ld.so.conf.d/local-lib.conf