simplify Learner2D plotting in the notebook

Author: basnijholt

learner.ipynb

@@ -218,10 +218,7 @@
    "source": [
     "def plot(learner):\n",
     "    plot = learner.plot(tri_alpha=0.2)\n",
-    "    title = f'loss={learner._loss:.3f}, n_points={learner.npoints}'\n",
-    "    return (plot.Image\n",
-    "            + plot.EdgePaths.I.opts(plot=dict(title_format=title))\n",
-    "            + plot)\n",
+    "    return plot.Image + plot.EdgePaths.I + plot\n",
     "\n",
     "runner.live_plot(plotter=plot, update_interval=0.1)"
    ]