message: [alloc] fix clippy warning
diff: #[panic_handler]
  pub fn panic(_info: &core::panic::PanicInfo) -> ! {
  - unsafe { core::intrinsics::abort() }
  + core::intrinsics::abort()
  }
  // `extern` fn uses type `core::alloc::Layout`, which is not FFI-safe
  #[allow(improper_ctypes)]
  #[alloc_error_handler]
  pub extern "C" fn oom(_: core::alloc::Layout) -> ! {
  - unsafe { core::intrinsics::abort() }
  + core::intrinsics::abort()
  }
  