diff --git a/headers/private/input/cbuf_adapter.h b/headers/private/input/cbuf_adapter.h
deleted file mode 100644
index d3f322d774..0000000000
--- a/headers/private/input/cbuf_adapter.h
+++ /dev/null
@@ -1,36 +0,0 @@
-#ifndef __CBUF_ADAPTER_H
-#define __CBUF_ADAPTER_H
-
-#include <SupportDefs.h>
-
-struct cbuffer_t;
-typedef struct cbuffer_t cbuffer;
-
-size_t cbuf_getn_no_lock(cbuffer *, char *, size_t);
-size_t cbuf_putn_no_lock(cbuffer *, char *, size_t);
-cbuffer *cbuf_init(size_t size);
-void cbuf_delete(cbuffer *buffer);
-char cbuf_get(cbuffer *);
-bool cbuf_mt(cbuffer *);
-bool cbuf_full(cbuffer *);
-status_t cbuf_put(cbuffer *, char);
-status_t cbuf_unput(cbuffer *);
-void cbuf_flush(cbuffer *);
-size_t cbuf_size(cbuffer *);
-size_t cbuf_avail(cbuffer *);
-size_t cbuf_free(cbuffer *);
-size_t cbuf_putn(cbuffer *, char *, size_t num_bytes);
-size_t cbuf_getn(cbuffer *, char *, size_t num_bytes);
-cpu_status cbuf_lock(cbuffer *);
-void cbuf_unlock(cbuffer *, cpu_status);
-
-#define cbuf cbuffer
-#define cbuf_get_chain(size) cbuf_init(size)
-#define cbuf_free_chain(chain) cbuf_delete(chain)
-#define cbuf_memcpy_from_chain(dest, chain, offset, size) \
-	(cbuf_getn(chain, dest, size) - size)
-#define cbuf_memcpy_to_chain(chain, offset, source, size) \
-	(cbuf_putn(chain, source, size) - size)
-
-
-#endif