Hi Indrit,
You can find this in footer block of template, I recommend to override this block this way:
1/ Copy file: /templates/ja_healthcare/tpls/blocks/footer.php
2/ Paste to: /templates/ja_healthcare/local/tpls/blocks/ (Create this path if it doesn't exist)
3/ Edit file: /templates/ja_healthcare/local/tpls/blocks/footer.php and remove this snippet of code:
<!-- ADDTHIS -->
<div id="addthis-wrap" class="addthis-wrap">
<button class="btn btn-primary" title="Addthis"><i class="fa fa-share-alt"></i></button>
<!-- Go to www.addthis.com/dashboard to customize your tools -->
<div class="addthis_inline_follow_toolbox"></div>
</div>
