update: collectd configuration can be removed

setup/start.sh

@@ -136,12 +136,6 @@ log "Configuring collectd"
 rm -rf /etc/collectd /var/log/collectd.log
 ln -sfF "${PLATFORM_DATA_DIR}/collectd" /etc/collectd
 cp "${script_dir}/start/collectd/collectd.conf" "${PLATFORM_DATA_DIR}/collectd/collectd.conf"
-if [[ "${ubuntu_version}" == "20.04" ]]; then
-    # https://bugs.launchpad.net/ubuntu/+source/collectd/+bug/1872281
-    if ! grep -q LD_PRELOAD /etc/default/collectd; then
-        echo -e "\nLD_PRELOAD=/usr/lib/python3.8/config-3.8-x86_64-linux-gnu/libpython3.8.so" >> /etc/default/collectd
-    fi
-fi
 systemctl restart collectd
 
 log "Configuring sysctl"