Fix warning from unneeded macro_use

Fixup for #526

Author: nicholasbishop

uefi-services/src/lib.rs

@@ -20,7 +20,6 @@
 #![feature(alloc_error_handler)]
 #![feature(abi_efiapi)]
 
-#[macro_use]
 extern crate log;
 // Core types.
 extern crate uefi;