Revert "Patch colab with fallback runtime"

This reverts commit d3b8ee8ce090ff61ee4f6ddb4ba2aebbe2df7b06.

README.md

@@ -13,9 +13,9 @@ PySR uses evolutionary algorithms to search for symbolic expressions which optim
 
 <div align="center">
 
-| **Docs** | **colab** | **pip** | **conda** | **Stats** |
-|---|---|---|---|---|
-|[![Documentation](https://github.com/MilesCranmer/PySR/actions/workflows/docs.yml/badge.svg)](https://astroautomata.com/PySR/)|[![Colab](https://img.shields.io/badge/colab-notebook-yellow)](https://colab.research.google.com/github/MilesCranmer/PySR/blob/master/examples/pysr_demo.ipynb)|[![PyPI version](https://badge.fury.io/py/pysr.svg)](https://badge.fury.io/py/pysr)|[![Conda Version](https://img.shields.io/conda/vn/conda-forge/pysr.svg)](https://anaconda.org/conda-forge/pysr)|<div align="center">pip: [![Downloads](https://pepy.tech/badge/pysr)](https://badge.fury.io/py/pysr)<br>conda: [![Anaconda-Server Badge](https://anaconda.org/conda-forge/pysr/badges/downloads.svg)](https://anaconda.org/conda-forge/pysr)</div>|
+| **Docs** | **pip** | **conda** | **Stats** |
+|---|---|---|---|
+|[![Documentation](https://github.com/MilesCranmer/PySR/actions/workflows/docs.yml/badge.svg)](https://astroautomata.com/PySR/)|[![PyPI version](https://badge.fury.io/py/pysr.svg)](https://badge.fury.io/py/pysr)|[![Conda Version](https://img.shields.io/conda/vn/conda-forge/pysr.svg)](https://anaconda.org/conda-forge/pysr)|<div align="center">pip: [![Downloads](https://pepy.tech/badge/pysr)](https://badge.fury.io/py/pysr)<br>conda: [![Anaconda-Server Badge](https://anaconda.org/conda-forge/pysr/badges/downloads.svg)](https://anaconda.org/conda-forge/pysr)</div>|
 
 </div>
 

examples/pysr_demo.ipynb

@@ -9,15 +9,6 @@
         "# Setup"
       ]
     },
-    {
-      "cell_type": "code",
-      "execution_count": null,
-      "metadata": {},
-      "outputs": [],
-      "source": [
-        "!echo \"Runtime started.\""
-      ]
-    },
     {
       "cell_type": "markdown",
       "metadata": {
@@ -27,19 +18,13 @@
         "\n",
         "## Instructions\n",
         "1. Work on a copy of this notebook: _File_ > _Save a copy in Drive_ (you will need a Google account).\n",
-        "2. (Optional) If you would like to do the deep learning component of this tutorial, ensure the GPU accelerator is turned on, with Edit->Notebook settings->Hardware accelerator->GPU\n",
-        "3. **Use fallback runtime**. Run the above cell (`!echo \"Runtime started.\"`) to start the runtime. Now, open the command pallette (bottom left -> second icon from the bottom), and search for \"use fallback runtime\", and hit enter.\n",
-        "   - This is a temporary workaround for a bug in Colab, until the current runtime is patched.\n",
-        "4. Execute the following cell (click on it and press Ctrl+Enter or Shift+Enter) to install Julia, IJulia and other packages. This takes a couple of minutes.\n",
-        "5. Continue to the next section.\n",
+        "2. (Optional) If you would like to do the deep learning component of this tutorial, turn on the GPU with Edit->Notebook settings->Hardware accelerator->GPU\n",
+        "3. Execute the following cell (click on it and press Ctrl+Enter) to install Julia, IJulia and other packages (if needed, update `JULIA_VERSION` and the other parameters). This takes a couple of minutes.\n",
+        "4. Continue to the next section.\n",
         "\n",
         "_Notes_:\n",
-        "* If your Colab Runtime gets reset (e.g., due to inactivity), repeat steps 4-5.\n",
-        "* After installation, if you want to change the Julia version or activate/deactivate the GPU, you will need to reset the Runtime: _Runtime_ > _Delete and disconnect runtime_ and repeat steps 2-5.\n",
-        "\n",
-        "> **Warning**\n",
-        "> \n",
-        "> Ensure that you have done step 3 above, otherwise you will get an error when you try to use Julia."
+        "* If your Colab Runtime gets reset (e.g., due to inactivity), repeat steps 3, 4.\n",
+        "* After installation, if you want to change the Julia version or activate/deactivate the GPU, you will need to reset the Runtime: _Runtime_ > _Delete and disconnect runtime_ and repeat steps 2-4."
       ]
     },
     {