OvmfPkg/VirtNorFlashDxe: remove disk I/O protocol implementation

We only use NOR flash for firmware volumes, either for executable images
or for the variable store. So we have no need for exposing disk I/O on
top of the NOR flash partitions so let's remove it.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>

OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.c

@@ -58,12 +58,6 @@ NOR_FLASH_INSTANCE  mNorFlashInstanceTemplate = {
     1,     // LogicalBlocksPerPhysicalBlock
   }, // Media;
 
-  {
-    EFI_DISK_IO_PROTOCOL_REVISION, // Revision
-    NorFlashDiskIoReadDisk,        // ReadDisk
-    NorFlashDiskIoWriteDisk        // WriteDisk
-  },
-
   {
     FvbGetAttributes,      // GetAttributes
     FvbSetAttributes,      // SetAttributes
@@ -159,8 +153,6 @@ NorFlashCreateInstance (
                     &Instance->DevicePath,
                     &gEfiBlockIoProtocolGuid,
                     &Instance->BlockIoProtocol,
-                    &gEfiDiskIoProtocolGuid,
-                    &Instance->DiskIoProtocol,
                     NULL
                     );
     if (EFI_ERROR (Status)) {