Clean headers in RemoteLinux.

Ran script to remove inludes on a trial-and-error basis and
manually corrected it.

Change-Id: Ie7559562218ecab65da17f58e3515556a4a1d5c5
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/plugins/remotelinux/genericlinuxdeviceconfigurationwidget.cpp

@@ -35,8 +35,6 @@
 #include <ssh/sshconnection.h>
 #include <ssh/sshkeycreationdialog.h>
 
-#include <QTextStream>
-
 using namespace ProjectExplorer;
 using namespace RemoteLinux;
 using namespace QSsh;