convert //courgette to std::unique_ptr

courgette/memory_allocator.h

Index: courgette/memory_allocator.h
diff --git a/courgette/memory_allocator.h b/courgette/memory_allocator.h
index 6541e9138f30772b5b7566f4a5ed607f1dfb9c09..e1d8573df8effa0baba605b2129224e99286fcd6 100644
--- a/courgette/memory_allocator.h
+++ b/courgette/memory_allocator.h
@@ -77,7 +77,8 @@ void UncheckedDelete(T* object) {
   }
 }
 
-// A deleter for scoped_ptr that will delete the object via UncheckedDelete().
+// A deleter for std::unique_ptr that will delete the object via
+// UncheckedDelete().
 template <class T>
 struct UncheckedDeleter {
   inline void operator()(T* ptr) const { UncheckedDelete(ptr); }