mb/starlabs/starbook/kbl: Remove tcc_offset entry

The TCC offset is configured in devtree.c, so remove it from
the devicetree.

Change-Id: I044a68854cc142b057cf31b4e2456d2ad1d0dd3a
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80461
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>

src/mainboard/starlabs/starbook/variants/kbl/devicetree.cb

@@ -30,9 +30,6 @@ chip soc/intel/skylake
 	register "PmConfigSlpSusMinAssert"	= "3"				# 500ms
 	register "PmConfigSlpAMinAssert"	= "3"				# 2s
 
-	# Thermal
-	register "tcc_offset"			= "10"
-
 	# PM Util
 	# GPE configuration
 	# Note that GPE events called out in ASL code rely on this