Target: Remove useless include

Add a include for QtDebug elsewhere where this include tended to add this
implicitly.

Also remove a using namespace directive that is unused and no longer works
since the namespace is no longer defined due to the removed include.

Change-Id: Ic216127a96c8aa11366defa0397f934d5a735925
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/projectexplorer/buildconfiguration.cpp

@@ -43,6 +43,8 @@
 #include <utils/qtcassert.h>
 #include <utils/stringutils.h>
 
+#include <QDebug>
+
 static const char BUILD_STEP_LIST_COUNT[] = "ProjectExplorer.BuildConfiguration.BuildStepListCount";
 static const char BUILD_STEP_LIST_PREFIX[] = "ProjectExplorer.BuildConfiguration.BuildStepList.";
 static const char CLEAR_SYSTEM_ENVIRONMENT_KEY[] = "ProjectExplorer.BuildConfiguration.ClearSystemEnvironment";

src/plugins/projectexplorer/target.h

@@ -30,7 +30,6 @@
 #ifndef TARGET_H
 #define TARGET_H
 
-#include "devicesupport/idevice.h"
 #include "projectconfiguration.h"
 #include "projectexplorer_export.h"
 

src/plugins/remotelinux/remotelinuxrunconfiguration.cpp

@@ -40,7 +40,6 @@
 #include <qtsupport/qtoutputformatter.h>
 
 using namespace ProjectExplorer;
-using namespace QSsh;
 using namespace Utils;
 
 namespace RemoteLinux {