message: remove obsolete function __rg_oom
  it is already part of the alloc library
diff: @@ -43,10 +43,3 @@ fn rust_oom(layout: Layout) -> ! {
  arch::processor::halt();
  }
  }
  -
  -#[cfg(any(target_os = "none", target_os = "hermit"))]
  -#[no_mangle]
  -pub unsafe extern "C" fn __rg_oom(size: usize, align: usize) -> ! {
  - let layout = Layout::from_size_align_unchecked(size, align);
  - rust_oom(layout)
  -}
  