Javascript remove style using giving it a id or a class

so I have this HTML code where I hide the body of the website using

    <style>
        body{
          display: none;
        }
    </style>

    <body>
    <p>Something..</p>
    </body>

but now I want to remove this using Javascript without giving the body an ID or a class. As a solution I’ve tried the following but it is not working.

document.getElementsByTagName("body")[0].removeAttribute("style");

Any help is appreciated. Thanks.