Blackberry: Remove blackberry support

Keep QNX.

A short informal search did not turn up any more blackberry users,
even though there is interest in QNX. So this patch removes the
platform: We had no contact with the maintainers in months, there
are no changes going into the code for about as long.

I am not even aware of anybody testing the platform, so any
remaining users are probably better of with Qt Creator 3.2 or so
where the code was extensively tested.

Change-Id: Ibeda6bfd8565599918cfcc08fd01cb5ed8793dc2
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/plugins/qnx/qnxdeviceconfiguration.cpp

@@ -263,7 +263,7 @@ void QnxDeviceConfiguration::executeAction(Core::Id actionId, QWidget *parent)
     const QnxDeviceConfiguration::ConstPtr device =
             sharedFromThis().staticCast<const QnxDeviceConfiguration>();
     if (actionId == Core::Id(DeployQtLibrariesActionId)) {
-        QnxDeployQtLibrariesDialog dialog(device, QnxDeployQtLibrariesDialog::QNX, parent);
+        QnxDeployQtLibrariesDialog dialog(device, parent);
         dialog.exec();
     } else {
         RemoteLinux::LinuxDevice::executeAction(actionId, parent);