Update README.md

IQAir API not accesible(Free tier)

README.md

@@ -715,7 +715,6 @@ API | Description | Auth | HTTPS | CORS |
 | [CO2 Offset](https://co2offset.io/api.html) | API calculates and validates the carbon footprint | No | Yes | Unknown |
 | [Danish data service Energi](https://www.energidataservice.dk/) | Open energy data from Energinet to society | No | Yes | Unknown |
 | [GrünstromIndex](https://gruenstromindex.de/) | Green Power Index for Germany (Grünstromindex/GSI) | No | No | Yes |
-| [IQAir](https://www.iqair.com/air-pollution-data-api) | Air quality and weather data | `apiKey` | Yes | Unknown |
 | [Luchtmeetnet](https://api-docs.luchtmeetnet.nl/) | Predicted and actual air quality components for The Netherlands (RIVM) | No | Yes | Unknown |
 | [National Grid ESO](https://data.nationalgrideso.com/) | Open data from Great Britain’s Electricity System Operator | No | Yes | Unknown |
 | [OpenAQ](https://docs.openaq.org/) | Open air quality data | `apiKey` | Yes | Unknown |