In some cases, you would like to use the collect feature to collect your photos from a different gallery to a different gallery without displaying the source gallery link.
CSS Code
There is no option to hide it without using a few lines of CSS code. Just add a CSS content block to the ENTIRE SITE section of your website and then add this code to it:
CSS
/*Hide the link to the source gallery of collected photos*/
.sm-user-ui .sm-image-metadata-attribution {
display: none;
}