fix: remove irrelevant code

The show selector no longer influences the application state.

src/Pages/ShowEpisode.vue

@@ -33,13 +33,4 @@ watchEffect(() => {
     void router.push({ name: 'show-episodes', params: { showId: props.show.id.toString() } })
   }
 })
-
-watchEffect(() => {
-  const showId = episode.value?.showId
-  // if episode.showId doesn’t match the provided show.id,
-  // the user might have switched shows with the show selector.
-  if (showId && showId !== props.show.id) {
-    void router.push({ name: 'show', params: { showId: props.show.id.toString() } })
-  }
-})
 </script>