How to remove the SCAYT plugin in CKEditor 4?

The Free versions of SpellCheckAsYouType (SCAYT) product is provided as a plugin, which integrated by default in CKEditor WYSIWYG editor. To remove the SCAYT plugin from CKEditor 4 you need to add the following line to your CKEditor config.js file: 

config.removePlugins = 'scayt';

If you want to leave SCAYT available, but prevent the feature from being turned on automatically on loading the editor, set the config.scayt_autoStartup configuration setting to false. This is the default value for CKEditor configuration.

config.scayt_autoStartup = false;