Posted by "author" removal

can you give me a link?

try adding to custom CSS this:
.author vcard {
display:none;
}

Thank you, but it did not work..

have you installed the theme on your website? can you give me the link to your website?

At this point, running local… Wanted to make changes before installing on site..

Sorry guys for being late with this reply.

There was a mistake in the code provided by @thedesigneryouneed.
The correct snippet of code needed is:

.byline {
    display:none;
}

Put it in Appearance > Edit CSS.