remove unneeded include

Former-commit-id: c4c431c08ce1cab4104d8339f6dc4bfbfd7d0cdd

include/igl/redux.h

@@ -34,7 +34,6 @@ namespace igl
 
 // Implementation
 
-#include "redux.h"
 #include "for_each.h"
 
 template <typename AType, typename Func, typename DerivedB>