x86/nmi: Remove stale EDAC include leftover

db47d5f8 ("x86/nmi, EDAC: Get rid of DRAM error reporting thru PCI SERR NMI")

forgot to remove it. Drop it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190923193807.30896-1-bp@alien8.de