diff --git a/ch3-coop/os/src/link_app.S b/ch3-coop/os/src/link_app.S
deleted file mode 100644
index 4b4e3d9..0000000
--- a/ch3-coop/os/src/link_app.S
+++ /dev/null
@@ -1,47 +0,0 @@
-
-    .align 3
-    .section .data
-    .global _num_app
-_num_app:
-    .quad 5
-    .quad app_0_start
-    .quad app_1_start
-    .quad app_2_start
-    .quad app_3_start
-    .quad app_4_start
-    .quad app_4_end
-
-    .section .data
-    .global app_0_start
-    .global app_0_end
-app_0_start:
-    .incbin "../user/target/riscv64gc-unknown-none-elf/release/00hello_world.bin"
-app_0_end:
-
-    .section .data
-    .global app_1_start
-    .global app_1_end
-app_1_start:
-    .incbin "../user/target/riscv64gc-unknown-none-elf/release/01store_fault.bin"
-app_1_end:
-
-    .section .data
-    .global app_2_start
-    .global app_2_end
-app_2_start:
-    .incbin "../user/target/riscv64gc-unknown-none-elf/release/02power.bin"
-app_2_end:
-
-    .section .data
-    .global app_3_start
-    .global app_3_end
-app_3_start:
-    .incbin "../user/target/riscv64gc-unknown-none-elf/release/03priv_inst.bin"
-app_3_end:
-
-    .section .data
-    .global app_4_start
-    .global app_4_end
-app_4_start:
-    .incbin "../user/target/riscv64gc-unknown-none-elf/release/04priv_csr.bin"
-app_4_end: