Update README.md

Author: Silentscripter

README.md

@@ -6,15 +6,6 @@ Laravel 5 wrapper for Prestashop Web Service Library
 Installation
 ------------
 
-Add these lines to your `composer.json` file at the end of the object:
-
-```javascript
-"minimum-stability": "dev",
-"prefer-stable": true
-```
-The `"minimum-stability": "dev"` line is needed because the underlying Prestashop Web Service Library is not versioned so you must tell Composer to allow packages still in development.
-Adding `"prefer-stable": true` will tell Composer to provide stable packages if found over dev ones, this is not compulsory but suggested if you don'thave specific needs for your dependencies.
-
 Require this package with composer using the following command:
 
 ```shell
@@ -257,4 +248,4 @@ The result will be this as expected:
         </product_feature>
     </product_features>
 ...
-```
+```