How to get rid of the horizontal line under h1, h2 and h3 heading?

Hello,
how do I get rid of the horizontal line shown below?
I love Logseq, but I believe, it adds unnecessary structuring to the page.

Thanks in advance.

Finally I found the solution (actually h3 doesn’t have such underline):
I had to add the following to my custom.css

.editor-inner .uniline-block:is(.h1,.h2), .ls-block :is(h1,h2) {
  	border-bottom: none;
}