Consolidate frontend (#9915)

* Consolidate frontend

* Remove home-assistant-polymer submodule

* Convert to using a pypi package for frontend

* fix release script

* Lint

* Remove unused file

* Remove frontend related scripts

* Move hass_frontend to frontend REQUIREMENTS

* Fix tests

* lint

* Address comments

* Lint + fix tests in py34

* Fix py34 tests again

* fix typo

script/bootstrap

@@ -5,10 +5,6 @@
 set -e
 
 cd "$(dirname "$0")/.."
-script/bootstrap_server
 
-if command -v yarn >/dev/null ; then
-  script/bootstrap_frontend
-else
-  echo "Frontend development not possible without Node/yarn"
-fi
+echo "Installing test dependencies..."
+python3 -m pip install tox colorlog