Disable Global Image Borders?

I’m not sure why I’m having so much trouble disabling borders on this sliced graphic I made… I have assigned the following CSS styles to the DIV and img class but it still produces borders:

site: https://wp.pros2preps.com/watch-live/
CSS:
.livefeed {
margin: 0px;
padding: 0px;
height: 494px;
width: 910px;
border:none
}
.livefeed img {
margin: 0px;
padding: 0px;
border:none
}
.borderless {
margin: 0px;
padding: 0px;
border:none
}

Code:

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