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.remarpro.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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