[REF] *: <a/> elements do not need the oe_link class

The 'oe_link' class is not linked to any style. The class is
automatically converted to 'btn-link' for <button/> elements but this
will not be done on <a/> elements as they are (nearly) unprocessed
node during views rendering.

Also there is minor difference between a '.btn-link' element and a
<a/> element anyway (and maybe there should not be at all).

addons/auth_oauth/views/res_config_settings_views.xml

@@ -27,7 +27,7 @@
                                     <label for="auth_oauth_google_client_id" string="Client ID:" class="col-md-3 o_light_label"/>
                                     <field name="auth_oauth_google_client_id" placeholder="e.g. 1234-xyz.apps.googleusercontent.com"/>
                                 </div>
-                                <a href="https://www.odoo.com/documentation/user/online/general/auth/google.html"  target="_blank" class="oe_link"><i class="fa fa-fw fa-arrow-right"/>Tutorial</a>
+                                <a href="https://www.odoo.com/documentation/user/online/general/auth/google.html" target="_blank"><i class="fa fa-fw fa-arrow-right"/>Tutorial</a>
                             </div>
                         </div>
                     </div>

addons/pos_mercury/views/pos_config_setting_views.xml

@@ -10,7 +10,7 @@
                     <button name="%(pos_mercury.action_configuration_form)d" icon="fa-arrow-right" type="action" string="Vantiv Accounts" class="btn-link"/>
                 </div>
                 <div>
-                    <a class="oe_link" href="https://www.odoo.com/page/point-of-sale-hardware#part_8" target="_blank"><i class="fa fa-fw fa-arrow-right"/>Buy a card reader</a>
+                    <a href="https://www.odoo.com/page/point-of-sale-hardware#part_8" target="_blank"><i class="fa fa-fw fa-arrow-right"/>Buy a card reader</a>
                 </div>
             </div>
         </field>

addons/website/static/src/xml/website.backend.xml

@@ -50,12 +50,12 @@
 
     <div t-name="website.ga_dialog_content">
         Your Tracking ID: <input type="text" name="ga_analytics_key" placeholder="UA-XXXXXXXX-Y" t-att-value="ga_analytics_key" style="width: 100%"></input>
-        <a href="https://www.odoo.com/documentation/user/online/website/optimize/google_analytics.html" class="oe_link fa fa-arrow-right" target="_blank">
+        <a href="https://www.odoo.com/documentation/user/online/website/optimize/google_analytics.html" class="fa fa-arrow-right" target="_blank">
             How to get my Tracking ID
         </a>
         <br/><br/>
         Your Client ID: <input type="text" name="ga_client_id" t-att-value="ga_key" style="width: 100%"></input>
-        <a href="https://www.odoo.com/documentation/user/online/website/optimize/google_analytics_dashboard.html" class="oe_link fa fa-arrow-right" target="_blank">
+        <a href="https://www.odoo.com/documentation/user/online/website/optimize/google_analytics_dashboard.html" class="fa fa-arrow-right" target="_blank">
             How to get my Client ID
         </a>
     </div>

addons/website_twitter/views/res_config_settings_views.xml

@@ -26,7 +26,7 @@
                                 <field name="twitter_screen_name" class="oe_inline"/>
                             </div>
                             <div>
-                                <a data-toggle="modal" class="oe_link fa fa-arrow-right" href="#" data-target="#twitter_tutorial">
+                                <a data-toggle="modal" class="fa fa-arrow-right" href="#" data-target="#twitter_tutorial">
                                     Tutorial
                                 </a>
                             </div>