fix(registry): remove invalid media from caption components (#2454)

* fix(registry): remove invalid media from caption components

* test(registry): enforce nested media contracts

registry/components/caption-neon-glow/caption-neon-glow.html

@@ -33,14 +33,6 @@
         overflow: hidden;
         background: transparent;
       }
-      #ne-video {
-        position: absolute;
-        inset: 0;
-        z-index: 0;
-        width: 100%;
-        height: 100%;
-        object-fit: cover;
-      }
       .ne-overlay {
         position: absolute;
         inset: 0;
@@ -91,15 +83,6 @@
       data-width="1920"
       data-height="1080"
     >
-      <video
-        id="ne-video"
-        muted
-        playsinline
-        data-start="0"
-        data-duration="8"
-        data-track-index="0"
-        data-has-audio="false"
-      ></video>
       <div class="ne-overlay"></div>
       <div id="ne-container"></div>
     </div>