Wordfence scan reports file changed from WordPress repository

Wordfence scan reports the following problem:
Modified plugin file: wp-content/plugins/wp-snow-effect/includes/wp-settings-framework.php
Type: File
Issue Found 7 Apr 2019 6:14 am
Medium

“This file belongs to plugin “WP Snow Effect” version “1.1.8” and has been modified from the file that is distributed by www.ads-software.com for this version.”

The comparison between the two is that the WordPress distributed file contains on line 511 screen_icon();
but the modified file on my server is missing that. PHP notises say screen_icon() is deprecated so will keeping the revised file cause any harm?

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