mb/google/{dedede,hatch}: Remove unneeded documentation

This documentation doesn't add any more value. Thus, remove it.

Change-Id: I0402bc736c6cc77d88a836bddce8eadae8ec5d7c
Signed-off-by: Felix Singer <felix.singer@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57115
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

src/mainboard/google/dedede/variants/baseboard/devicetree.cb

@@ -169,10 +169,6 @@ chip soc/intel/jasperlake
 
 	register "tcc_offset" = "10"     # TCC of 90C
 
-	# Use below format to override value in overridetree.cb if required
-	# format:
-	# register "common_soc_config.<variable_name>" = "value"
-
 	# VR config settings
 	# Imon Slope correction specified in 1/100 increment values. Range is 0-200.
 	# Eg: 125 = 1.25

src/mainboard/google/hatch/variants/baseboard/devicetree.cb

@@ -195,10 +195,6 @@ chip soc/intel/cannonlake
 	register "gpio_pm[COMM_3]" = "0"
 	register "gpio_pm[COMM_4]" = "0"
 
-	# Use below format to override value in overridetree.cb if required
-	# format:
-	# register "common_soc_config.<variable_name>" = "value"
-
 	device cpu_cluster 0 on
 		device lapic 0 on end
 	end