Each social share icon has its own class that you can use and target to hide from the front end. You can do this by adding the code below to your theme style.css file.
In the menu click on Appearance -> Editor.
To remove facebook share add this code:
.gens-referral_share__fb { display:none!important; }
To remove twitter share add this code:
.gens-referral_share__tw { display:none!important; }
To remove google plus share add this code:
.gens-referral_share__gp { display:none!important; }
Place it at the bottom of your style.css file which is the first one that opens when you go to Appearance -> Editor. Also, make sure to clear your website’s cache and browser cache to see the changes.