backups: remove "skip dom0" option (#791)

User always can choose (or not) dom0 on the VMs selection page.

qubesmanager/restore.py

@@ -118,9 +118,6 @@ class RestoreVMsWindow(Ui_Restore, QWizard):
     def on_ignore_uname_mismatch_toggled(self, checked):
         self.restore_options['ignore-username-mismatch'] = checked
 
-    def on_skip_dom0_toggled(self, checked):
-        self.restore_options['dom0-home'] = checked
-
     def cleanupPage(self, p_int):
         if self.page(p_int) is self.select_vms_page:
             self.vms_to_restore = None
@@ -170,9 +167,6 @@ class RestoreVMsWindow(Ui_Restore, QWizard):
         if 'ignore-username-mismatch' in self.restore_options:
             self.ignore_uname_mismatch.setChecked(self.restore_options['ignore-username-mismatch'])
 
-        if 'dom0-home' in self.restore_options:
-            self.skip_dom0.setChecked(self.restore_options['dom0-home'])
-
     def gather_output(self, s):
         self.func_output.append(s)
 

restoredlg.ui

@@ -56,13 +56,6 @@
          </property>
         </widget>
        </item>
-       <item row="0" column="1">
-        <widget class="QCheckBox" name="skip_dom0">
-         <property name="text">
-          <string>skip dom0</string>
-         </property>
-        </widget>
-       </item>
        <item row="1" column="0">
         <widget class="QCheckBox" name="ignore_uname_mismatch">
          <property name="toolTip">