Removed graph_network in notebook for docs

Author: csmith763

examples/flume_overview.ipynb

@@ -422,10 +422,6 @@
     "    log_prefix=\".\",\n",
     ")\n",
     "\n",
-    "# Graph the system network to visualize connections\n",
-    "graph = flume_sys.graph_network(\n",
-    "    filename=\"ConstrainedRosenbrock\", output_directory=\".\"\n",
-    ")\n",
     "\n",
     "# Declare the design variables for the system\n",
     "flume_sys.declare_design_vars(\n",