minor, phiflow install commands

diffphys-code-burgers.ipynb

@@ -28,7 +28,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "#!pip install --upgrade --quiet phiflow\n",
+    "!pip install --upgrade --quiet phiflow\n",
     "from phi.tf.flow import *\n",
     "\n",
     "N = 128\n",
@@ -591,4 +591,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}

diffphys-code-ns.ipynb

@@ -79,8 +79,6 @@
    "execution_count": 1,
    "source": [
     "!pip install --upgrade --quiet phiflow\n",
-    "#!pip install --upgrade --quiet git+https://github.com/tum-pbs/PhiFlow@develop\n",
-    "\n",
     "from phi.torch.flow import *  \n",
     "import pylab # for visualizations later on\n"
    ],