Remove broken link (IQ air API)

README.md

@@ -170,7 +170,6 @@ Restful APIs for consuming geospatial data on the fly:
 - [Geoapify](https://apidocs.geoapify.com/) - Maps, address and location search, route optimization, reachability analysis, geodata access, and more.
 - [OpenCage](https://opencagedata.com/api) - Forward and reverse worldwide geocoding API using open data.
 - [breezometer](https://docs.breezometer.com/api-documentation/introduction/) - API endpoints for Air Quality, Pollen, Weather, Wildfire, Cleanest Routes and Environmental Alerts. Serves current conditions, forecasts, and historical data.
-- [IQAir](https://www.iqair.com/air-pollution-data-api) - Air quality API. Global, historical, real-time and forecast air quality data.
 - [ipfind](https://ipfind.io/) - Geographic location of an IP address or any domain name along with some other useful information.
 - [bng2latlong](https://www.getthedata.com/bng2latlong) - Simple API to convert an OSGB36 easting and northing (British National Grid) to WGS84 latitude and longitude.
 - [Open Postcode Geo API](https://www.getthedata.com/open-postcode-geo-api) - British postcodes with easting, northing, latitude, and longitude.