Properly initialize Harmony remote (#10665)

The delay_secs variable was not initialized if discovery was active and no
matching configuration block existed (i.e. override was None).

homeassistant/components/remote/harmony.py

@@ -60,6 +60,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
                         False)
 
         port = DEFAULT_PORT
+        delay_secs = DEFAULT_DELAY_SECS
         if override:
             activity = override.get(ATTR_ACTIVITY)
             delay_secs = override.get(ATTR_DELAY_SECS)