mb/razer/blade_stealth_kbl: Remove duplicate ACPI power button device

The ASL code is copied from the Purism Librem 13v3, and is not needed,
as the standard fixed power button is used. It was removed for the
Pursim devices in commit 2d977b2dcb (mb/purism: remove duplicate ACPI
power button).

Change-Id: I18155ea672e7309b367ad4170f2f00f0b3e557db
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41019
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Mimoja <coreboot@mimoja.de>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/mainboard/razer/blade_stealth_kbl/acpi/mainboard.asl

@@ -24,16 +24,4 @@ Scope (\_SB)
 		}
 	}
 
-	Device (PWRB)
-	{
-		Name (_HID, EisaId ("PNP0C0C"))
-
-		Method (_STA)
-		{
-			Return (0xF)
-		}
-
-		Name (_PRW, Package () { 27, 4 })
-	}
-
 }