Do not include linux/slab.h as all module code now uses managed memory
allocations and thus neither k*alloc() nor kfree() is used.
Signed-off-by: NMichał Kępień <kernel@kempniu.pl>
Reviewed-by: NJonathan Woithe <jwoithe@just42.net>
Signed-off-by: NDarren Hart (VMware) <dvhart@infradead.org>