thermal/drivers/ti-soc-thermal: Remove unused function ti_thermal_get_temp()

commit b263b473 ("thermal: ti-soc-thermal: Remove redundant code")
left behind this, remove it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20220305125047.26948-1-yuehaibing@huawei.com


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>