Fix #8634 (Send to Device problem)

src/calibre/gui2/device.py

@@ -7,7 +7,7 @@ import os, traceback, Queue, time, cStringIO, re, sys
 from threading import Thread
 
 from PyQt4.Qt import QMenu, QAction, QActionGroup, QIcon, SIGNAL, \
-                     Qt, pyqtSignal, QDialog, QMessageBox
+                     Qt, pyqtSignal, QDialog
 
 from calibre.customize.ui import available_input_formats, available_output_formats, \
     device_plugins
@@ -609,10 +609,8 @@ class DeviceMixin(object): # {{{
         autos = u'\n'.join(map(unicode, map(force_unicode, autos)))
         return self.ask_a_yes_no_question(
                 _('No suitable formats'), msg,
-                buttons=QMessageBox.Yes|QMessageBox.Cancel,
                 ans_when_user_unavailable=True,
-                det_msg=autos,
-                show_copy_button=False
+                det_msg=autos
         )
 
     def set_default_thumbnail(self, height):