update quickstart doc

docs/quickstart/quickstart.ipynb

@@ -122,7 +122,6 @@
     "    line: # settings for line interaction opacity, at least one subfield is required\n",
     "        disable: <True or False>\n",
     "        broadening: <list of non-thermal broadening sources considered> # may include radiation, linear_stark, quadratic_stark, and/or van_der_waals, omit or use [] for none\n",
-    "        broadening_range: <maximum distance in frquency space to the resonant frequency for line broadening to be considered> # necessary for computational efficiency and must have units, 1e13 Hz recommended\n",
     "no_of_thetas: <number of angles to sample for raytracing>\n",
     "```\n",
     "\n",