fix: remove redundant options

code-model=medium is default options of rustc

Signed-off-by: Woshiluo Luo <woshiluo.luo@outlook.com>

Makefile.toml

@@ -19,7 +19,7 @@ dependencies = ["prototyper-nemu-build"]
 [tasks.prototyper-build]
 command = "cargo"
 args = ["build", "-prustsbi-prototyper", "--release", "--target", "riscv64imac-unknown-none-elf", "-Zbuild-std=core"]
-env = {"RUSTFLAGS"="-C relocation-model=pie -C code-model=medium -C link-arg=-pie" }
+env = {"RUSTFLAGS"="-C relocation-model=pie -C link-arg=-pie" }
 
 [tasks.prototyper]
 command = "rust-objcopy"