no additional colab link, remove lp model files

Author: Marika-K

3d_tic_tac_toe/3d_tic_tac_toe.ipynb

@@ -17,14 +17,6 @@
     "**Download the Repository** <br /> \n",
     "You can download the repository containing this and other examples by clicking [here](https://github.com/Gurobi/modeling-examples/archive/master.zip). \n",
     "\n",
-    "\n",
-    "**Gurobi License** <br /> \n",
-    "In order to run this Jupyter Notebook properly, you must have a Gurobi license. If you do not have one, you can request an \n",
-    "[evaluation license](https://www.gurobi.com/downloads/request-an-evaluation-license/?utm_source=3PW&utm_medium=OT&utm_campaign=WW-MU-EDU-OR-O_LEA-PR_NO-Q3_FY20_WW_JPME_3D-Tic-Tac-Toe_COM_EVAL_GITHUB_&utm_term=logic-programing&utm_content=C_JPM)\n",
-    "as a *commercial user*, or download a \n",
-    "[free license](https://www.gurobi.com/academia/academic-program-and-licenses/?utm_source=3PW&utm_medium=OT&utm_campaign=WW-MU-EDU-OR-O_LEA-PR_NO-Q3_FY20_WW_JPME_3D-Tic-Tac-Toe_ACADEMIC_EVAL_GITHUB_&utm_term=logic-programing&utm_content=C_JPM)\n",
-    "as an *academic user*.\n",
-    "\n",
     "---\n",
     "## Problem Description\n",
     "\n",
@@ -72,6 +64,15 @@
     "We import the Gurobi Python Module."
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%pip install gurobipy"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,