Remove emtpy modal calls.

modal('show') should work for all versions of bootstrap.

mfa/templates/TrustedDevices/start.html

@@ -15,7 +15,6 @@
     function sendEmail() {
         $("#modal-title").html("Send Link")
         $("#modal-body").html("Sending Email, Please wait....");
-        $("#popUpModal").modal();
         $("#popUpModal").modal('show');
         $.ajax({
             "url":"{% url 'td_sendemail' %}",
@@ -61,8 +60,7 @@
                     $("#actionBtn").remove();
                     $("#modal-footer").prepend("<button id='actionBtn' class='btn btn-success' onclick='checkMFA()'>Trust Device</button>")
                     $("#modal-body").html(data)
-                    $("#popUpModal").modal()
-                    $("#popUpModal").modal('show')
+                    $("#popUpModal").modal('show');
                 }
             }
         })