remove group extension commands

The Group Extension Commands section was originally introduced to
support ARM SBMR.

Since phosphor-ipmi-host now provides the support for the commands [1],
this redundant implementation can be removed to avoid duplication and
simplify maintenance.

[1] https://github.com/openbmc/phosphor-host-ipmid/commit/0a3f40b92c44bb196e355f845c6aafd1d2dce5fe

Change-Id: Ie20ab6a035adc7314a70164adbc3bc779013dfd6
Signed-off-by: Potin Lai <potin.lai@quantatw.com>
3 files changed