Fix build time warning

Change-Id: I0aa1fa59512d7376f7884bd36840279c32413bc5
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/projectexplorer/project.cpp

@@ -390,7 +390,7 @@ bool Project::needsConfiguration() const
 
 void Project::configureAsExampleProject(const QStringList &platforms)
 {
-
+    Q_UNUSED(platforms);
 }
 
 } // namespace ProjectExplorer