Drop the count column from the tag manager

It increases the horizontal width of the table, and isn’t particularly
useful.

core/ui/TagManager.tid

@@ -26,14 +26,12 @@ title: $:/TagManager
 <tbody>
 <tr>
 <th><<lingo Tag/Heading>></th>
-<th><<lingo Count/Heading>></th>
 <th><<lingo Colour/Heading>></th>
 <th><<lingo Icon/Heading>></th>
 </tr>
 <$list filter="[tags[]!is[system]sort[title]]">
 <tr>
 <td><$transclude tiddler="$:/core/ui/TagTemplate"/></td>
-<td><$count filter="[all[current]tagging[]]"/></td>
 <td><$edit-text field="color" tag="input" type="text" size="9"/> <$edit-text field="color" tag="input" type="color"/></td>
 <td><$macrocall $name="iconEditor" title={{!!title}}/></td>
 </tr>