PLT-5573 - Fixing emoticons (#5461)

webapp/sass/layout/_post.scss

@@ -1137,7 +1137,6 @@
             padding: 0 4px 0 3px;
 
             .post-reaction__emoji {
-                height: auto;
                 margin: 2px 3px 0 0;
                 max-height: 16px;
                 max-width: 16px;