Remove unused member

Change-Id: I0e937203eaf95db76fb1f432b7706c7bb560a789
Reviewed-on: http://codereview.qt-project.org/5449

Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/plugins/projectexplorer/processstep.cpp

@@ -72,7 +72,6 @@ ProcessStep::ProcessStep(BuildStepList *bsl, ProcessStep *bs) :
     m_command(bs->m_command),
     m_arguments(bs->m_arguments),
     m_workingDirectory(bs->m_workingDirectory),
-    m_env(bs->m_env),
     m_enabled(bs->m_enabled)
 {
     ctor();

src/plugins/projectexplorer/processstep.h

@@ -99,7 +99,6 @@ private:
     QString m_command;
     QString m_arguments;
     QString m_workingDirectory;
-    Utils::Environment m_env;
     bool m_enabled;
 };