[Glitch] Run eslint --fix

I don't like it changing files this way, but it's basically what
c49213f0ea and a few others did.

app/javascript/flavours/glitch/actions/height_cache.js

@@ -8,10 +8,10 @@ export function setHeight (key, id, height) {
     id,
     height,
   };
-};
+}
 
 export function clearHeight () {
   return {
     type: HEIGHT_CACHE_CLEAR,
   };
-};
+}