Varargs notation `::Any...` is incorrectly flagged as unused variable

When using `::Any...` in a method definition, that argument is incorrectly flagged as "unused variable".

For example:

```julia
function my_function(::Any...)
    # ...
end
```

This warning is suppressed if braces are used:

```julia
function my_function(::(Any...))
    # ...
end
```