Enable generating batches from RNTuple

Author: Martin Foll

bindings/pyroot/pythonizations/python/ROOT/_pythonization/_tmva/_batchgenerator.py

@@ -162,11 +162,6 @@ def __init__(
 
         self.noded_rdf = RDF.AsRNode(rdataframe)
 
-        if ROOT.Internal.RDF.GetDataSourceLabel(self.noded_rdf) != "TTreeDS":
-            raise ValueError(
-                "RNode object must be created out of TTrees or files of TTree"
-            )
-
         if isinstance(target, str):
             target = [target]