Merge branch 'tz-load-emojis-from-server-not-cdn' into 'master'

Removes the CDN loading for emojis.json

See merge request gitlab-org/gitlab-ce!26102

app/assets/javascripts/emoji/index.js

@@ -33,10 +33,7 @@ export function initEmojiMap() {
       }
       axiosInstance
-        .get(
-          `${gon.asset_host || ''}${gon.relative_url_root ||
-            ''}/-/emojis/${EMOJI_VERSION}/emojis.json`,
-        )
+        .get(`${gon.relative_url_root || ''}/-/emojis/${EMOJI_VERSION}/emojis.json`)
         .then(({ data }) => {
           emojiMap = data;
           validEmojiNames = [...Object.keys(emojiMap), ...Object.keys(emojiAliases)];