yaml tidyups and warning removals

esphome/esp-loungemoesdimmer2.yaml

@@ -77,6 +77,15 @@ packages:
       local_friendly_name: "${friendly_name}"
       local_update_interval: "${update_interval}"
 
+      # Package item removals
+wifi:
+  min_auth_mode: !remove # The WPA2 only works on esp32/8266
+  reboot_timeout: 15min    # override the selection from from the common package
+  fast_connect: false      # (optional) force off, in case package vars change
+
+mqtt:
+  keepalive: 15s # overriding the value from the common package
+
 #########################################################################################
 # ESPHome
 # https://esphome.io/components/esphome.html