Add/remove image from navigation bar

Because there are many ways and many possibilities for adding a image to the bar.
It is really hard to tell how to remove it directly.

However, it looks like it is controlled in CSS and you could try the following.

You may try to look for a theme1.css file and then search for .uk-navbar-container:not(.uk-navbar-transparent)

You will see

/* ... skipped here */

    background-image: url(orange-circle2.svg);

/* ... skipped here */

change to

/* ... skipped here */

    background-image: none; /* <--- change to none to hide the image */

/* ... skipped here */