Uninstalling
Deactivating (Configuration, then Plugins) takes the reactions bar out of posts and keeps everything else. Activating again brings it all back.
Uninstalling removes the plugin’s tables, settings, templates, stylesheet and the images
uploaded to uploads/reactions/, and the column it adds to the users table.
After uninstalling, delete the plugin’s files: inc/plugins/reactions.php,
inc/plugins/reactions/, admin/modules/config/reactions.php,
inc/languages/english/reactions.lang.php,
inc/languages/english/admin/config_reactions.lang.php, images/reactions/ and
jscripts/reactions/.