Remove block device test.

os/src/drivers/block/mod.rs

@@ -20,6 +20,7 @@ lazy_static! {
     pub static ref BLOCK_DEVICE: Arc<dyn BlockDevice> = Arc::new(BlockDeviceImpl::new());
 }
 
+#[allow(unused)]
 pub fn block_device_test() {
     let block_device = BLOCK_DEVICE.clone();
     let mut write_buffer = [0u8; 512];

os/src/drivers/mod.rs

@@ -1,3 +1,3 @@
 mod block;
 
-pub use block::{BLOCK_DEVICE, block_device_test};
+pub use block::BLOCK_DEVICE;

os/src/main.rs

@@ -44,7 +44,6 @@ pub fn rust_main() -> ! {
     println!("[kernel] Hello, world!");
     mm::init();
     mm::remap_test();
-    drivers::block_device_test();
     task::add_initproc();
     trap::init();
     trap::enable_timer_interrupt();