Remove dependencies and requirements (#23024)

* Remove dependencies and requirements

* Revert "Remove dependencies and requirements"

This reverts commit fe7171b4cd30889bad5adc9a4fd60059d05ba5a7.

* Remove dependencies and requirements

* Revert "Remove dependencies and requirements"

This reverts commit 391355ee2cc53cbe6954f940062b18ae34b05621.

* Remove dependencies and requirements

* Fix flake8 complaints

* Fix more flake8 complaints

* Revert non-component removals

homeassistant/components/sql/sensor.py

@@ -15,8 +15,6 @@ from homeassistant.helpers.entity import Entity
 
 _LOGGER = logging.getLogger(__name__)
 
-REQUIREMENTS = ['sqlalchemy==1.3.0']
-
 CONF_COLUMN_NAME = 'column'
 CONF_QUERIES = 'queries'
 CONF_QUERY = 'query'