Core: Remove dead code

Change-Id: Ia8d85cb54c96fbca09331df6f5ac360100011dab
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/coreplugin/progressmanager/progressview.cpp

@@ -35,8 +35,6 @@
 using namespace Core;
 using namespace Core::Internal;
 
-static const int PROGRESS_WIDTH = 100;
-
 ProgressView::ProgressView(QWidget *parent)
     : QWidget(parent), m_referenceWidget(0), m_hovered(false)
 {