efi/cper: Remove unnecessary aer.h include

<linux/aer.h> is unused, so remove it.

Link: https://lore.kernel.org/r/20230307203356.882479-1-helgaas@kernel.orgSigned-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>

drivers/firmware/efi/cper-arm.c

@@ -12,7 +12,6 @@
 #include <linux/dmi.h>
 #include <linux/acpi.h>
 #include <linux/pci.h>
-#include <linux/aer.h>
 #include <linux/printk.h>
 #include <linux/bcd.h>
 #include <acpi/ghes.h>