Undo an unneceesary workaround

Author: FrancescAlted

src/blosc2/schunk.py

@@ -676,15 +676,7 @@ def get_chunk(self, nchunk: int) -> bytes:
 
     def get_vlblock(self, nchunk: int, nblock: int) -> bytes:
         """Return the decompressed payload of one VL block from a chunk."""
-        get_vlblock = getattr(super(), "get_vlblock", None)
-        if get_vlblock is not None:
-            return get_vlblock(nchunk, nblock)
-
-        block_payloads = blosc2_ext.vldecompress(self.get_chunk(nchunk), **asdict(self.dparams))
-        try:
-            return block_payloads[nblock]
-        except IndexError as exc:
-            raise IndexError("VL block index out of range") from exc
+        return super().get_vlblock(nchunk, nblock)
 
     def delete_chunk(self, nchunk: int) -> int:
         """Delete the specified chunk from the SChunk.