[RF] Remove unneeded pointer dereferencing in RooFit tutorial rf617

Now that also objects returned by smart pointer get automatically
downcasted to the actual type, we don't need to dereference returned
smart pointer objects to trigger the automatic downcasting.

Author: guitargeek

tutorials/roofit/roofit/rf617_simulation_based_inference_multidimensional.py

@@ -261,17 +261,9 @@ def learned_likelihood_ratio(*args):
 nllr_learned.plotOn(frame1, LineColor="kP6Blue", ShiftToZero=True, Name="learned")
 
 
-# Declare a helper function in ROOT to dereference unique_ptr
-ROOT.gInterpreter.Declare(
-    """
-RooAbsArg &my_deref(std::unique_ptr<RooAbsArg> const& ptr) { return *ptr; }
-"""
-)
-
 # Choose normalization set for lhr_calc to plot over
 norm_set = ROOT.RooArgSet(x_vars)
-lhr_calc_final_ptr = ROOT.RooFit.Detail.compileForNormSet(lhr_calc, norm_set)
-lhr_calc_final = ROOT.my_deref(lhr_calc_final_ptr)
+lhr_calc_final = ROOT.RooFit.Detail.compileForNormSet(lhr_calc, norm_set)
 lhr_calc_final.recursiveRedirectServers(norm_set)
 
 # Plot the likelihood ratio functions