refactor: remove one text area, notify that "Custom" needs content (#5304)

Reviewed-on: #5304

fsfe.org/contribute/spreadtheword.en.xhtml

@@ -108,7 +108,7 @@ On this page, you'll find an overview of our available materials and detailed in
           <div>
             <label for="custom"><input type="radio" name="packagetype" id="custom" value="custom" required="required"/>Custom: You can set preferences, e.g. specific campaigns or the type of promotion materials. Unfortunately we cannot guarantee to fulfill all wishes.
             <div class="reveal">
-              <textarea name="specifics" rows="6" cols="40" placeholder="For example: Only leaflets explaining Free Software, no posters..." />
+              <textarea name="specifics" rows="6" cols="40" placeholder="For example: Only leaflets explaining Free Software, no posters... Don't forget to fill this out!" />
             </div>
             </label>
           </div>
@@ -142,10 +142,6 @@ On this page, you'll find an overview of our available materials and detailed in
       </fieldset>
       <fieldset>
         <legend>Last steps</legend>
-        <div>
-          <span class="formlabel">Additional comment:</span>
-          <textarea name="comment" rows="2" cols="40"/>
-        </div>
         <div>
           <input type="text" name="address" placeholder="Which address shall be used?" size="20" class="special"/>
         </div>