Remove some unused variables

When Andi reverted the HPET resource reservation (in commit
0f8dc2f06560e2ca126d1670a24126ba08357d38), he didn't remove the now
unused variables, which just causes gcc to be noisy.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index 3e497fd..a574cd2 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -621,8 +621,6 @@
 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 {
 	struct acpi_table_hpet *hpet_tbl;
-	struct resource *hpet_res;
-	resource_size_t res_start;
 
 	hpet_tbl = (struct acpi_table_hpet *)table;
 	if (!hpet_tbl) {