remove all useless header comments (#3363)

see #3358

used command: `find ./ -type f -exec perl -i -0pe
's/\/\*\s*magicmirror.*?\*\/\s*//si' {} \;`

This is a first draft, I think we should preserve some of the comments.

modules/default/weather/providers/openmeteo.js

@@ -1,15 +1,9 @@
 /* global WeatherProvider, WeatherObject */
 
-/* MagicMirror²
- * Module: Weather
- * Provider: Open-Meteo
- *
- * By Andrés Vanegas
- * MIT Licensed
- *
- * This class is a provider for Open-Meteo, based on Andrew Pometti's class
- * for Weatherbit.
+/* This class is a provider for Open-Meteo,
+ * see https://open-meteo.com/
  */
+
 // https://www.bigdatacloud.com/docs/api/free-reverse-geocode-to-city-api
 const GEOCODE_BASE = "https://api.bigdatacloud.net/data/reverse-geocode-client";
 const OPEN_METEO_BASE = "https://api.open-meteo.com/v1";