icnss2: Remove vbatt feature code for holi

This change removes vbatt feature code from 5.4
kernel to avoid compilation issue realted to adc tm
api's. This feature will be enabled once conflicts
between icnss2 and adc_tm configs is resolved.

Change-Id: If875e93edfea3bbcccd3194f95f534933131e42d
Signed-off-by: Sandeep Singh <sandsing@codeaurora.org>