rust: remove panicking stub for __mulodi4

Since Rust 1.60, LLVM is upgraded to LLVM 14 and it will no longer
generate `__mulodi4` calls (https://godbolt.org/z/cWhE718rM), so
this stub can be removed.

Signed-off-by: Gary Guo <[email protected]>

Author: nbdd0121

rust/compiler_builtins.rs

@@ -53,5 +53,4 @@ define_panicking_intrinsics!("`u128` should not be used", {
 #[cfg(target_arch = "arm")]
 define_panicking_intrinsics!("`u64` division/modulo should not be used", {
     __aeabi_uldivmod,
-    __mulodi4,
 });