I just was digging a little bit deeper and found out that this is hardcoded in the pixelwars plugin in the the file pixelwars-core/themes/global/share-links.php
I removed the parts of twitter and Pinterest in both functions:
– pixelwars_core_share_links_meta()
– pixelwars_core_share_links()
I solved that topic at least for now but I‘m very unhappy about this style of coding because any future update of the theme will break this changes.
I strongly advise you to change this part from a hardcoded into a widget-based one. Not a lot of people are able to do this changes like I did and to be honest: I‘m a bit pissed that I have to change this kind of things in this way.