drm/xe: Remove __xe_vm_bind forward declaration

Not needed so remove it.
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_vm.c

@@ -696,11 +696,6 @@ static void preempt_rebind_work_func(struct work_struct *w)
 	trace_xe_vm_rebind_worker_exit(vm);
 }
 
-struct async_op_fence;
-static int __xe_vm_bind(struct xe_vm *vm, struct xe_vma *vma,
-			struct xe_engine *e, struct xe_sync_entry *syncs,
-			u32 num_syncs, struct async_op_fence *afence);
-
 static bool vma_userptr_invalidate(struct mmu_interval_notifier *mni,
 				   const struct mmu_notifier_range *range,
 				   unsigned long cur_seq)