rm unused sdat.hdf5 property

Author: amorison

src/stagpy/stagyydata.py

@@ -669,12 +669,6 @@ def parpath(self) -> Path:
             return parpath
         return parpath / "par"
 
-    @cached_property
-    def hdf5(self) -> Path | None:
-        """Path of output hdf5 folder if relevant, None otherwise."""
-        h5xmf = self.par.h5_output("Data.xmf")
-        return h5xmf.parent if h5xmf.is_file() else None
-
     @cached_property
     def steps(self) -> Steps:
         """Collection of time steps."""