Remove obsolete megacli collector. (#798)

This collector has been replaced by the textfile collector tool
`storcli.py`.

end-to-end-test.sh

@@ -31,7 +31,6 @@ enabled_collectors=$(cat << COLLECTORS
   stat
   textfile
   bonding
-  megacli
   wifi
   xfs
   zfs
@@ -95,7 +94,6 @@ fi
   $(for c in ${enabled_collectors}; do echo --collector.${c}  ; done) \
   $(for c in ${disabled_collectors}; do echo --no-collector.${c}  ; done) \
   --collector.textfile.directory="collector/fixtures/textfile/two_metric_files/" \
-  --collector.megacli.command="collector/fixtures/megacli" \
   --collector.wifi.fixtures="collector/fixtures/wifi" \
   --collector.qdisc.fixtures="collector/fixtures/qdisc/" \
   --web.listen-address "127.0.0.1:${port}" \