[REM] useless icon send a message

The action is available from the wall.

addons/mail/static/src/js/mail.js

@@ -1984,51 +1984,6 @@ openerp.mail = function (session) {
         }
     });
 
-
-    /**
-     * ------------------------------------------------------------
-     * UserMenu
-     * ------------------------------------------------------------
-     * 
-     * Add a link on the top user bar for write a full mail
-     */
-    session.web.ComposeMessageTopButton = session.web.Widget.extend({
-        template:'mail.ComposeMessageTopButton',
-
-        start: function () {
-            this.$el.on('click', this.on_compose_message);
-            this._super();
-        },
-
-        on_compose_message: function (event) {
-            event.preventDefault();
-            event.stopPropagation();
-            var action = {
-                type: 'ir.actions.act_window',
-                res_model: 'mail.compose.message',
-                view_mode: 'form',
-                view_type: 'form',
-                views: [[false, 'form']],
-                target: 'new',
-                context: {},
-            };
-            session.client.action_manager.do_action(action);
-        },
-    });
-
-    session.web.UserMenu.include({
-        do_update: function(){
-            var self = this;
-            this._super.apply(this, arguments);
-            this.update_promise.then(function() {
-                var mail_button = new session.web.ComposeMessageTopButton();
-                mail_button.appendTo(session.webclient.$el.parents().find('.oe_systray'));
-                openerp.web.bus.trigger('resize');  // Re-trigger the reflow logic
-            });
-        },
-    });
-
-
     /**
      * ------------------------------------------------------------
      * Sub-widgets loading

addons/mail/static/src/xml/mail.xml

@@ -335,18 +335,6 @@
         </div>
     </t>
 
-    <!--
-        mail.compose_message.button_top_bar
-        render of the button on the user bar for open wizard compose message
-        -->
-    <t t-name="mail.ComposeMessageTopButton">
-        <li title='Compose new Message'>
-            <a href="#">
-                <i id="oe_topbar_compose_full_email_icon" class="fa fa-envelope-o"/>
-            </a>
-        </li>
-    </t>
-
     <!-- mail.thread.message.vote
         Template used to display Like/Unlike in a mail.message
     -->