diff --git a/src/system/kernel/device_manager/IORequest.cpp b/src/system/kernel/device_manager/IORequest.cpp
index 347732a131..1e53f6023d 100644
--- a/src/system/kernel/device_manager/IORequest.cpp
+++ b/src/system/kernel/device_manager/IORequest.cpp
@@ -1409,110 +1409,3 @@ vip_io_request_allocator_init()
 	dprintf("vip_io_request_allocator_init(): created VIP I/O heap: %p\n",
 		sVIPHeap);
 }
-
-
-// #pragma mark -
-
-
-#if 0
-
-/*!	Creates an I/O request with the specified buffer and length.
-
-	\param write write access if true, read access if false.
-	\param flags allows several flags to be specified:
-		\c B_USER_IO_REQUEST the buffer is assumed to be a userland buffer
-			and handled with special care.
-		\c B_ASYNC_IO_REQUEST the I/O request is to be fulfilled asynchronously.
-		\c B_PHYSICAL_IO_REQUEST the buffer specifies a physical rather than a
-			virtual address.
-	\param _request If successful, the location pointed to by this parameter
-		will contain a pointer to the created request.
-*/
-status_t
-create_io_request(void* buffer, size_t length, bool write, uint32 flags,
-	io_request** _request)
-{
-	return B_ERROR;
-}
-
-
-/*!	Creates an I/O request from the specified I/O vector and length.
-	See above for more info.
-*/
-status_t
-create_io_request_vecs(iovec* vecs, size_t count, size_t length, bool write,
-	uint32 flags, io_request** _request)
-{
-	return B_ERROR;
-}
-
-
-/*!	Prepares the I/O request by locking its memory, and, if \a virtualOnly
-	is \c false, will retrieve the physical pages.
-*/
-status_t
-prepare_io_request(io_request* request, bool virtualOnly)
-{
-	return B_ERROR;
-}
-
-
-/*!	Prepares the I/O request by locking its memory, and mapping/moving the
-	pages as needed to fulfill the DMA restrictions.
-	If needed, a bounce buffer is used for DMA.
-*/
-status_t
-prepare_io_request_dma(io_request* request, dma_resource* dmaResource)
-{
-	return B_ERROR;
-}
-
-
-/*!	Returns the buffers of the I/O request mapped into kernel memory.
-	This can be used by drivers to fill an I/O request manually.
-*/
-status_t
-map_io_request(io_request* request, iovec* vecs, size_t count)
-{
-	return B_ERROR;
-}
-
-
-/*!	Get the memory map of the DMA buffer for this I/O request.
-	This can be used to retrieve the physical pages to feed the hardware's
-	DMA engine with.
-*/
-status_t
-get_io_request_memory_map(dma_buffer* buffer, io_request* request, iovec* vecs,
-	size_t count)
-{
-	return B_ERROR;
-}
-
-
-/*!	Unmaps any previously mapped data, and will copy the data back from any
-	bounce buffers if necessary.
-*/
-status_t
-complete_io_request_dma(io_request* request, dma_resource* dmaResource)
-{
-	return B_ERROR;
-}
-
-
-/*!	Unmaps any previously mapped data.
-*/
-status_t
-complete_io_request(io_request* request)
-{
-	return B_ERROR;
-}
-
-
-void
-delete_io_request(io_request* request)
-{
-}
-
-#endif	// 0
-