remove image4.io

README.md

@@ -1245,7 +1245,6 @@ Table of Contents
    * [sync.com](https://www.sync.com/) - End-to-End cloud storage service. 5 GB free storage
    * [pcloud.com](https://www.pcloud.com/) - Cloud storage service. Up to 10 GB free storage
    * [sirv.com](https://sirv.com/) — Smart Image CDN with on-the-fly image optimization and resizing. Free tier includes 500 MB of storage and 2 GB bandwidth.
-   * [image4.io](https://image4.io/) — Image upload, powerful manipulations, storage and delivery for websites and apps, with SDK's, integrations and migration tools. Free tier includes 25 credits. 1 credit is equal to 1 GB of CDN usage, 1GB of storage or 1000 image transformations.
    * [cloudimage.com](https://cloudimage.com/) — Full image optimization and CDN service with 1500+ Points of Presence around the world. A variety of image resizing, compression, watermarking functions. Open source plugins for responsive images, 360 image making and image editing. Free monthly plan with 25GB of CDN traffic and 25GB of cache storage and unlimited transformations.
    * [cloudinary.com](https://cloudinary.com/) — Image upload, powerful manipulations, storage and delivery for sites and apps, with libraries for Ruby, Python, Java, PHP, Objective-C and more. Free tier includes 25 monthly credits. 1 credit is equal to 1,000 image transformations, 1 GB of storage, or 1 GB of CDN usage.
    * [easyDB.io](https://easydb.io/) — one-click, hosted database provider. They provide a database for the programming language of your choice for development purposes. The DB is ephemeral and will be deleted after 24 or 72 hours on the free tier.