Update pymc3/plots/__init__.py

Co-authored-by: Alexandre ANDORRA <[email protected]>

pymc3/plots/__init__.py

@@ -17,8 +17,7 @@
 Plots are delegated to the `ArviZ <https://arviz-devs.github.io/arviz/>`_ library, a general purpose library for
 "exploratory analysis of Bayesian models." For more details, see https://arviz-devs.github.io/arviz/
 
-In one case, PyMC3 does preserve the `plot_posterior_predictive_glm` to implement a combined
-implementation of both PyMC3 and Arviz to predictively pushforward samples.
+Only the `plot_posterior_predictive_glm` is kept in the PyMC code base for now,  but it'll will move to ArviZ once the latter adds features for regression plot.
 """
 import functools
 import sys