Here are some CSS tricks to hide buttons from the AddThis or SumoMe WordPress plugin. (19 Feb 2017)
AddThis: Remove Share counter!
In WordPress, click “Apperarance/Customize”, select “Additional CSS” and add the following code:
.addthis_counter {display:none!important;}
AddThis: Remove Print Button from side bar!
In WordPress, click “Apperarance/Customize”, select “Additional CSS” and add the following code:
.at-svc-print {display:none!important;}
SumoMe: Hide the Top Right Menu to visitors!
In WordPress, click “Apperarance/Customize”, select “Additional CSS” and add the following code:
a[title=Sumo], a[title=Sumo] {display: none!important;}
SumoMe: Hide the SumoMe LOGO!
In WordPress, click “Apperarance/Customize”, select “Additional CSS” and add the following code:
a[data-sumome-share="sumome"] {display:none!important;}
Source: myself.