Set reactionGroups to [] on optimistically rendered PR review comments

Author: smashwilson

lib/mutations/add-pr-review-comment.js

@@ -63,15 +63,7 @@ export default (environment, {body, inReplyTo, reviewID, threadID, viewerID, pat
     comment.setValue('https://github.com', 'url');
     comment.setValue(path, 'path');
     comment.setValue(position, 'position');
-
-    // Ensure that at least one empty emoji reaction group is present to avoid the reaction picker button "popping in"
-    const emptyGroup = store.create(`add-pr-review-comment:reaction-group:${placeholderID++}`, 'ReactionGroup');
-    emptyGroup.setValue('THUMBS_UP', 'content');
-    const emptyGroupUsers = store.create(`add-pr-review-comment:users:${placeholderID++}`, 'ReactingUserConnection');
-    emptyGroupUsers.setValue(0, 'totalCount');
-    emptyGroup.setLinkedRecord(emptyGroupUsers, 'users');
-    emptyGroup.setValue(false, 'viewerHasReacted');
-    comment.setLinkedRecords([emptyGroup], 'reactionGroups');
+    comment.setLinkedRecords([], 'reactionGroups');
 
     let author;
     if (viewerID) {