fix(submit): drop the redundant featured preview type badge

The reference theme renders no type badge in the featured box; the
swiper and dplayer previews are self-explanatory. Remove it from both
preview branches and delete the now-unused CSS rule.

templates/parts/submit/featured.php

@@ -39,7 +39,6 @@ $can_video = !empty($ctx['can_cover_video']);
 				<div class="swiper-button-next"></div>
 				<div class="swiper-pagination"></div>
 			</div>
-			<span class="featured-type-badge"><i class="fa fas fa-image"></i></span>
 		<?php elseif ($type === 'video') : ?>
 			<div class="new-dplayer dplayer-scale-height" style="--scale-height:50%;"
 				video-url="<?php echo esc_url((string) ($data['url'] ?? '')); ?>"
@@ -48,7 +47,6 @@ $can_video = !empty($ctx['can_cover_video']);
 					<div class="abs-center text-center"><i class="fa fas fa-play-circle fa-4x muted-3-color opacity5" aria-hidden="true"></i></div>
 				</div>
 			</div>
-			<span class="featured-type-badge"><i class="fa fas fa-video"></i></span>
 		<?php endif; ?>
 	</div>
 	<div class="btns-full flex ac jc">