Add the ability to set a build environment also for CMake projects.

Note: as for qt projects, this is also used for running. And we don't
use it for running cmake yet.

src/plugins/qt4projectmanager/qt4buildenvironmentwidget.cpp

@@ -28,8 +28,6 @@
 **************************************************************************/
 
 #include "qt4buildenvironmentwidget.h"
-
-#include "ui_qt4buildenvironmentwidget.h"
 #include "qt4project.h"
 
 #include <projectexplorer/environmenteditmodel.h>
@@ -56,11 +54,6 @@ Qt4BuildEnvironmentWidget::Qt4BuildEnvironmentWidget(Qt4Project *project)
             this, SLOT(clearSystemEnvironmentCheckBoxClicked(bool)));
 }
 
-Qt4BuildEnvironmentWidget::~Qt4BuildEnvironmentWidget()
-{
-
-}
-
 QString Qt4BuildEnvironmentWidget::displayName() const
 {
     return tr("Build Environment");