Remove .label-link class

Remove class as it is not doing anything anymore,
and reduced our CSS a tiny bit.

app/assets/stylesheets/pages/labels.scss

@@ -230,20 +230,6 @@
   }
 }
 
-.label-link {
-  display: inline-flex;
-  vertical-align: text-bottom;
-
-  &:hover .color-label {
-    text-decoration: underline;
-  }
-
-  .label {
-    vertical-align: inherit;
-    font-size: $label-font-size;
-  }
-}
-
 .labels-container {
   background-color: $gray-light;
   border-radius: $border-radius-default;

app/views/layouts/header/_default.html.haml

@@ -14,7 +14,7 @@
               %span.logo-text.d-none.d-lg-block.gl-ml-3
                 = logo_text
           - if Gitlab.com_and_canary?
-            = link_to 'https://next.gitlab.com', class: 'label-link canary-badge bg-transparent', target: :_blank do
+            = link_to 'https://next.gitlab.com', class: 'canary-badge bg-transparent', target: :_blank do
               %span.color-label.has-tooltip.badge.badge-pill.green-badge
                 = _('Next')