Slideshows automatically adds a black 1px border

[IglooRats]

Slideshows automatically adds 1px solid black border to all new slideshow, but not the old ones.

I cannot find the code on the css but while inspecting the published website and this code on the three pages:

table, th, td {

1. border:1px solid black;
2. border-collapse: collapse;

This code is absent from all the other pages. 

How can I correct this on the css?

Pictures of the code: