Use stable IMP release

As of IMP 2.22.0, we should have everything
in the stable release needed to run this
tutorial.

Jupyter/spatiotemporal-colab.ipynb

@@ -68,17 +68,10 @@
    "source": [
     "# For colab, we need to install IMP\n",
     "# Install IMP stable release\n",
-    "#!add-apt-repository -y ppa:salilab/ppa\n",
-    "#!apt install imp\n",
-    "#import sys, os, glob\n",
-    "#sys.path.append(os.path.dirname(glob.glob('/usr/lib/python*/dist-packages/IMP')[0]))\n",
-    "\n",
-    "# Install IMP develop\n",
-    "!echo \"deb [trusted=yes] https://integrativemodeling.org/nightly/download $(lsb_release -cs)/\" > /etc/apt/sources.list.d/salilab.list\n",
-    "!apt update\n",
+    "!add-apt-repository -y ppa:salilab/ppa\n",
     "!apt install imp\n",
     "import sys, os, glob\n",
-    "sys.path.append(os.path.dirname(glob.glob('/usr/lib/python*/dist-packages/IMP')[0])) \n",
+    "sys.path.append(os.path.dirname(glob.glob('/usr/lib/python*/dist-packages/IMP')[0]))\n",
     "\n",
     "!git clone https://github.com/salilab/imp_spatiotemporal_tutorial.git\n",
     "os.chdir('imp_spatiotemporal_tutorial/Jupyter/')"