Update lib.rs

Author: 0xxFloki

runtime/src/lib.rs

@@ -33,9 +33,6 @@ pub(crate) const SYS_READ_PRIVATE_INPUT: u32 = 0x400;
 #[cfg(target_arch = "riscv32")]
 pub(crate) const SYS_CYCLE_COUNT: u32 = 0x401;
 #[cfg(target_arch = "riscv32")]
-#[allow(dead_code)]
-pub(crate) const SYS_OVERWRITE_SP: u32 = 0x402;
-#[cfg(target_arch = "riscv32")]
 pub(crate) const SYS_ALLOC_ALIGNED: u32 = 0x403;
 #[cfg(target_arch = "riscv32")]
 pub(crate) const SYS_PERFORM_HEAP_ALLOCATION: u32 = 0x405;