Update phys_lib.cpp

Author: Zero3K20

drivers/filesystems/udfs/Include/phys_lib.cpp

@@ -1097,7 +1097,6 @@ UDFReadData(
     uint32 BSh=Vcb->SectorShift;
     NTSTATUS status;
     ULONG _ReadBytes = 0;
-    uint32 to_read;
 
     (*ReadBytes) = 0;
     if (!Length) return STATUS_SUCCESS;