powerpc/mm: remove unused variable

In file included from ./include/linux/hugetlb.h:445:0,
                 from arch/powerpc/kernel/setup-common.c:37:
./arch/powerpc/include/asm/hugetlb.h: In function ‘huge_ptep_clear_flush’:
./arch/powerpc/include/asm/hugetlb.h:154:8: error: variable ‘pte’ set but not used [-Werror=unused-but-set-variable]

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/hugetlb.h

@@ -129,8 +129,7 @@ static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
 					 unsigned long addr, pte_t *ptep)
 {
-	pte_t pte;
-	pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
+	huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
 	flush_hugetlb_page(vma, addr);
 }