JSFiddle - React, Tailwind, and code Playground

HTML

<select id="source_list" name="HOME_MODULES_AVAILABLE" size="16">
 <option value="TWITTER_FEED=N">1</option>
 <option value="MFLTIP=N">2</option>
 <option value="WHO_SHOULD_I_START=N">3</option>
 <option value="LEAGUE_MAP=W">4</option>
 <option value="MESSAGE=W">5</option>
 <option value="MESSAGE2=W">6</option>
 <option value="MESSAGE3=W">7</option>
 <option value="MESSAGE4=W">8</option>
</select>

JavaScript

$("#source_list > option[value^='MESSAGE']").remove();