Update README.md

Author: adityapatadia

README.md

@@ -27,11 +27,7 @@ If using [Composer](https://getcomposer.org/), in your `composer.json` file add:
 }
 ```
 
-If you are still using PHP 5.3, please install version ```1.7.0``` and if you are using PHP 5.4, please install version ```1.8.0``` of this library.
-
-WebP support is added with PHP `5.6.0` and current version of library supports that. If you are facing issues, please use `1.9.2` version of this library.
-
-For PHP versions >= 7.2 to 8.0, `2.0.x` or version of this library should be used.
+For PHP versions >= 7.2 to 8.0, `2.0.x` version of this library should be used.
 
 Otherwise: