Remove erroneous check, the gcp-devrel script handles in-place upgrades
MODIFY
_travis/install.sh
_travis/install.sh
@@ -55,7 +55,7 @@ fi
pip install tox
-if [[ "${TOXENV}" == "gae" && ! -d ${GAE_PYTHONPATH} ]]; then
+if [[ "${TOXENV}" == "gae" ]]; then
pip install gcp-devrel-py-tools
gcp-devrel-py-tools download-appengine-sdk /tmp/gae
fi

Remove erroneous check, the gcp-devrel script handles in-place upgrades