arm64: dts: msm8998-mtp: thermal: Remove skin and battery thermal zones

The msm8998-mtp doesn't have TSENS-based sensors wired up for skin and
battery thermal zones. TSENS sensors should be common across all boards
using the SoC and shouldn't be board-specific as these entries.

They also show the following error when trying to read the temperature

   cat: read error: Invalid argument

Remove these board-specific erroneous thermal zones.

Fixes: 4449b6f2 ("arm64: dts: qcom: msm8998: Add tsens and thermal-zones")
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Tested-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Signed-off-by: Andy Gross <agross@kernel.org>