UX: Removes avatar animation for mobile-user cards (#8483)

app/assets/stylesheets/mobile/discourse.scss

@@ -147,17 +147,3 @@ blockquote {
 #simple-container {
   width: 90%;
 }
-
-// this is used to provide visual feedback that indicates that the user / group
-// cards are loading after the user clicks on an avatar. It's mostly for very slow
-// connections. Users on good connections won't notice it.
-[data-user-card]:focus {
-  .avatar,
-  + .avatar-flair {
-    animation: wave 0.75s infinite;
-    animation-delay: 0.5s;
-  }
-  .avatar {
-    position: relative;
-  }
-}