Removed unwanted keywords on lib/utils.robot
Removed unwanted keywords on lib/utils.robot

PLDM Get BIOS Attribute keyword has some unwanted keyword which was mistakenly added, Hence removed.

Signed-off-by: ganesanb <63c2e9cd511b361d2f74a0174c993058dc1104a5@ami.com>
Change-Id: Ic47f1ad39fec94cddd72bb690390b1ae8fc2875d

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation