vdpa/mlx5: Remove unused function declarations

Commit 29064bf ("vdpa/mlx5: Add support library for mlx5 VDPA implementation")
declared but never implemented these.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Message-Id: <20230803143041.23388-1-yuehaibing@huawei.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Author: Yue Haibing

drivers/vdpa/mlx5/core/mlx5_vdpa.h

@@ -100,9 +100,6 @@ struct mlx5_vdpa_dev {
 	bool suspended;
 };
 
-int mlx5_vdpa_alloc_pd(struct mlx5_vdpa_dev *dev, u32 *pdn, u16 uid);
-int mlx5_vdpa_dealloc_pd(struct mlx5_vdpa_dev *dev, u32 pdn, u16 uid);
-int mlx5_vdpa_get_null_mkey(struct mlx5_vdpa_dev *dev, u32 *null_mkey);
 int mlx5_vdpa_create_tis(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tisn);
 void mlx5_vdpa_destroy_tis(struct mlx5_vdpa_dev *mvdev, u32 tisn);
 int mlx5_vdpa_create_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 *rqtn);