Remove special link class

This cleans up the code quite a bit, but also allows links in editable
content to be rendered with the default style.

app/views/admin/donations/_list.html.erb

@@ -12,7 +12,7 @@
   <tbody>
     <% donations.each do |donation| %>
       <tr>
-        <td><%= link_to donation.user.cn, admin_user_path(donation.user.cn), class: 'ks-text-link' %></td>
+        <td><%= link_to donation.user.cn, admin_user_path(donation.user.cn) %></td>
         <td class="text-right"><% if donation.amount_sats.present? %><%= number_with_delimiter donation.amount_sats %><% end %></td>
         <td class="text-right"><% if donation.fiat_amount.present? %><%= number_to_currency donation.fiat_amount.to_f / 100, unit: "" %> <%= donation.fiat_currency %><% end %></td>
         <td class="pl-2"><%= donation.public_name %></td>

app/views/admin/donations/show.html.erb

@@ -6,7 +6,7 @@
       <tbody>
         <tr>
           <th>User</th>
-          <td><%= link_to @donation.user.cn, admin_user_path(@donation.user.cn), class: 'ks-text-link' %></td>
+          <td><%= link_to @donation.user.cn, admin_user_path(@donation.user.cn) %></td>
         </tr>
         <tr>
           <th>Donation Method</th>