sandbox: Avoid defining HAVE_BLOCK_DEVICE in Konfig

This is not needed as it is implied or selected by other options anyway.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/Kconfig b/arch/Kconfig
index c4dc47d..994fd3b 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -146,7 +146,6 @@
 	select DM_SPI
 	select DM_SPI_FLASH
 	select GZIP_COMPRESSED
-	select HAVE_BLOCK_DEVICE
 	select LZO
 	select OF_BOARD_SETUP
 	select PCI_ENDPOINT