iommu/vt-d: Remove unused function declarations

Some functions have been removed. Remove the remaining function
delarations.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210323010600.678627-5-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/intel/pasid.h b/drivers/iommu/intel/pasid.h
index 444c0be..90a3268 100644
--- a/drivers/iommu/intel/pasid.h
+++ b/drivers/iommu/intel/pasid.h
@@ -99,9 +99,6 @@ static inline bool pasid_pte_is_present(struct pasid_entry *pte)
 }
 
 extern unsigned int intel_pasid_max_id;
-int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp);
-void intel_pasid_free_id(u32 pasid);
-void *intel_pasid_lookup_id(u32 pasid);
 int intel_pasid_alloc_table(struct device *dev);
 void intel_pasid_free_table(struct device *dev);
 struct pasid_table *intel_pasid_get_table(struct device *dev);