AthenaPython: Remove earlier std::stream workaround.

Remove earlier workaround for std::stream dictionary issues.
The workaround is now causing warnings in the python 3 build.
If the original issue recurs, will need to try to find
a different way to address it.

Control/AthenaPython/python/PyAthenaComps.py

@@ -72,10 +72,6 @@ class Alg( CfgPyAlgorithm ):
     should be overridden.
     """
     def __init__(self, name = None, **kw):
-        # Needed to prevent spurious root errors about streams in CreateRealData.
-        import ROOT
-        ROOT.GaudiPython.CallbackStreamBuf
-
         if name is None: name = kw.get('name', self.__class__.__name__)
         ## init base class
         super(Alg, self).__init__(name, **kw)