This is a false positive detection (a file that is reported as malware, but it is not one), you should not be alarmed because of this.
This message is given because my plugin uses the file_get_contents() PHP method. file_get_contents is a regular PHP function and it is used in some parts of the plugin as a fallback if other similar functions are not enabled on your server.
Please check also these couple of articles, that describe exactly the same false positive detection:
