Remove usage of no longer existing parameter in plot_voronoi_cells

Closes #224

Author: schroedtert

notebooks/fundamental_diagram.ipynb

@@ -1120,7 +1120,6 @@
     "    frame=frame,\n",
     "    traj_data=trajectories[name],\n",
     "    color_by_column=DENSITY_COL,\n",
-    "    show_ped_positions=True,\n",
     "    ped_size=5,\n",
     "    voronoi_outside_ma_alpha=0.4,\n",
     "    axes=ax1,\n",
@@ -1135,7 +1134,6 @@
     "    frame=frame,\n",
     "    traj_data=trajectories[name],\n",
     "    color_by_column=SPEED_COL,\n",
-    "    show_ped_positions=True,\n",
     "    ped_size=5,\n",
     "    voronoi_outside_ma_alpha=0.4,\n",
     "    axes=ax2,\n",
@@ -1150,7 +1148,6 @@
     "    frame=frame,\n",
     "    traj_data=trajectories[name],\n",
     "    color_by_column=ID_COL,\n",
-    "    show_ped_positions=True,\n",
     "    ped_size=5,\n",
     "    voronoi_outside_ma_alpha=0.4,\n",
     "    axes=ax3,\n",

notebooks/getting_started.ipynb

@@ -536,7 +536,6 @@
     "    color_by_column=DENSITY_COL,\n",
     "    vmin=0,\n",
     "    vmax=10,\n",
-    "    show_ped_positions=True,\n",
     ").set_aspect(\"equal\")\n",
     "plt.show()"
    ]