As a search engine optimizer and social media expert adding and removing social share button are essential for search engine optimization. Social media marketing is an indispensable part of seo.
More recently closing down of Google+ social network is very disappointing. If you are using blogspot and using custom blogspot theme. Then it is your duty to remove non-functionary social share button in blogspot.
After closing down of Google+ it become very essential to change Google+ to any other social network.
Find the below code
<div class='pbt-share-buttons'>And after find the code copy the below mention code
<a expr:href='"https://plus.google.com/share?url=" + data:post.url.canonical' onclick='javascript:window.open(this.href, "", "menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=600,width=600");return false;' rel='nofollow' style='background:#dd4b39;' target='_blank' title='Share this on Google+'><i class='fa fa-google-plus'/></a>
And remove the code. Now refresh the website and Google+ share button has gone disappeared from website.
Same process can be used for adding any specific social network for website.