Update machinelearning.rst (#1597)

Author: teytaud

docs/machinelearning.rst

@@ -303,8 +303,6 @@ If you want to run Open AI Gym, see `One-line for learning state-of-the-art Open
 Examples from our external users
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-Nevergrad is integrated in `Ray/Tune <https://docs.ray.io/en/latest/tune/api/doc/ray.tune.search.nevergrad.NevergradSearch.html>`_, Berkeley AI Research library for parameter tuning .
-
 Nevergrad is a plugin in `Hydra <https://hydra.cc/docs/plugins/nevergrad_sweeper/>`_ Facebook's parameter sweeping library.
 
 Nevergrad is interfaced in `IOH Profiler <https://iohprofiler.liacs.nl/>`_, a tool from Univ. Leiden, CNRS, Sorbonne univ and Tel Hai college for profiling optimization algorithms.