ui: re-remove the `Type` header on the service listing page (#6439)

The `Type` column used for giving details on what type of a service each
item is was removed in https://github.com/hashicorp/consul/pull/6075.

As a result of keeping long running branches in sync, this change was
partly reverted in an earlier PR (the type header was re-added)
https://github.com/hashicorp/consul/pull/5913 following a rebase.

This commit re-removes the `Type` table header (the `<th>`)

ui-v2/app/templates/dc/services/index.hbs

@@ -28,7 +28,6 @@
             }}
                 {{#block-slot 'header'}}
                     <th style={{remainingWidth}}>Service</th>
-                    <th>Type</th>
                     <th style={{totalWidth}}>Health Checks<span><em role="tooltip">The number of health checks for the service on all nodes</em></span></th>
                     <th style={{remainingWidth}}>Tags</th>
                 {{/block-slot}}