Disable precompilation in PySR colab demo

examples/pysr_demo.ipynb

@@ -53,8 +53,8 @@
         "\n",
         "#---------------------------------------------------#\n",
         "JULIA_VERSION=\"1.7.2\"\n",
-        "JULIA_PACKAGES=\"PyCall SymbolicRegression\"\n",
         "JULIA_NUM_THREADS=4\n",
+        "export JULIA_PKG_PRECOMPILE_AUTO=0\n",
         "#---------------------------------------------------#\n",
         "\n",
         "if [ -z `which julia` ]; then\n",
@@ -66,12 +66,6 @@
         "  wget -nv $URL -O /tmp/julia.tar.gz # -nv means \"not verbose\"\n",
         "  tar -x -f /tmp/julia.tar.gz -C /usr/local --strip-components 1\n",
         "  rm /tmp/julia.tar.gz\n",
-        "\n",
-        "  for PKG in `echo $JULIA_PACKAGES`; do\n",
-        "    echo \"Installing Julia package $PKG...\"\n",
-        "    julia -e 'using Pkg; pkg\"add '$PKG'; precompile;\"'\n",
-        "  done\n",
-        "  \n",
         "  julia -e 'println(\"Success\")'\n",
         "fi"
       ]
@@ -121,12 +115,13 @@
       ]
     },
     {
+      "attachments": {},
       "cell_type": "markdown",
       "metadata": {
         "id": "6u2WhbVhht-G"
       },
       "source": [
-        "Let's install the backend of PySR, and all required libraries. We will also precompile them so they are faster at startup.\n",
+        "Let's install the backend of PySR, and all required libraries.\n",
         "\n",
         "**(This may take some time)**"
       ]
@@ -1223,7 +1218,7 @@
       "name": "python",
       "nbconvert_exporter": "python",
       "pygments_lexer": "ipython3",
-      "version": "3.8.9"
+      "version": "3.10.8 (main, Oct 13 2022, 09:48:40) [Clang 14.0.0 (clang-1400.0.29.102)]"
     },
     "widgets": {
       "application/vnd.jupyter.widget-state+json": {