Flake8 bugbear fixes (#12072)

* Don't use mutable argument defaults (bugbear B006)

* Use callable(x) instead of hasattr(x, '__call__') (bugbear B004)

* Remove/mark unused loop control variables (bugbear B007)

* Fix stripping protocol from kodi host name (bugbear B005)

* Fix plant daily history add default date (bugbear B008)

homeassistant/components/notify/kodi.py

@@ -51,7 +51,7 @@ def async_get_service(hass, config, discovery_info=None):
     encryption = config.get(CONF_PROXY_SSL)
 
     if host.startswith('http://') or host.startswith('https://'):
-        host = host.lstrip('http://').lstrip('https://')
+        host = host[host.index('://') + 3:]
         _LOGGER.warning(
             "Kodi host name should no longer contain http:// See updated "
             "definitions here: "