diff --git a/v4/sample.h b/v4/sample.h
deleted file mode 100644
index c234c97..0000000
--- a/v4/sample.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#include "memory_Context.h"
-
-#ifndef memory_HEADER
-#define memory_HEADER
-
-memory_Context memory_generateConstPlayfield(memory_Context);
-memory_Context memory_selectItem(memory_Context);
-memory_Context memory_shouldDeselectMismatchedItems(memory_Context);
-memory_Context memory_shouldDetectVictory(memory_Context);
-memory_Context memory_shouldHideMatchingItems(memory_Context);
-
-#endif // memory_HEADER