Convert warning links to govuk-link--destructive

Converts links in the following:
- the page-footer component
- the table component
- the browse-list component
- the notification status, when reporting failures
- validation messaging in the whitelist page

app/assets/stylesheets/components/page-footer.scss

@@ -8,26 +8,9 @@
     line-height: 40px;
     padding: 1px 0 0 15px;
 
-    a {
-
-      &:visited,
-      &:link {
-        color: $error-colour;
-        display: inline-block;
-        vertical-align: center;
-      }
-
-      &:hover,
-      &:active {
-        color: $mellow-red;
-      }
-
-    }
-
   }
 
   &-delete-link-without-button {
-    @include core-19;
     padding: 0;
     display: inline-block;
   }