This will be style added by your theme or another plugin. Use of the Inspector in your browser would show that this is the offending CSS from visual-composer-theme-master.min.css:

.entry-content ul > li::before {
    content: '\2022';
    font-size: 1.5em;
    position: absolute;
    left: 20px;
    line-height: 1.3;
    color: #557cbf;
}

The simplest fix is to remove the content part with Custom CSS:

.searchandfilter .entry-content ul > li::before {
    content: '' !important;
}

You might wish to read up on the use of the browser inspector by finding some guides or tutorials on Google (if there are any), as it is a useful tool.