sb/amd/cimx/sb800: Drop OSFL method in ASL

Method only set variable OSRV, which nobody evaluates.

Change-Id: Ia21b544eaaa61a8fc634eb568b4c7401a225eb76
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50642
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/southbridge/amd/cimx/sb800/acpi/fch.asl b/src/southbridge/amd/cimx/sb800/acpi/fch.asl
index ee9b125..2059db0 100644
--- a/src/southbridge/amd/cimx/sb800/acpi/fch.asl
+++ b/src/southbridge/amd/cimx/sb800/acpi/fch.asl
@@ -134,30 +134,6 @@
 	Return (CRES) /* note to change the Name buffer */
 } /* end of Method(_SB.PCI0._CRS) */
 
-/* Some global data */
-Name(OSVR, 3)  /* Assume nothing. WinXp = 1, Vista = 2, Linux = 3, WinCE = 4 */
-
-Method(OSFL, 0){
-
-	if (OSVR != Ones) {Return (OSVR)}	/* OS version was already detected */
-
-	if(CondRefOf(\_OSI))
-	{
-		OSVR = 1				/* Assume some form of XP */
-		if (\_OSI("Windows 2006"))		/* Vista */
-		{
-			OSVR = 2
-		}
-	} else {
-		If (WCMP(\_OS,"Linux")) {
-			OSVR = 3			/* Linux */
-		} Else {
-			OSVR = 4			/* Gotta be WinCE */
-		}
-	}
-	Return(OSVR)
-}
-
 /*
 *
 *               FIRST METHOD CALLED UPON BOOT
@@ -180,9 +156,6 @@
 	/* DBGO(\_REV) */
 	/* DBGO("\n") */
 
-	/* Determine the OS we're running on */
-	OSFL()
-
 	/* On older chips, clear PciExpWakeDisEn */
 	/*if (\SBRI <= 0x13) {
 	*	\PWDE = 0