power: supply: bq25890_charger: Remove unused table entries

There are a few table entries that aren't used. Drop them.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Angus Ainslie (Purism) <angus@akkea.ca>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>