Suppress a RuboCop's offense

This commit suppresses the following offense:

```console
$ bundle exec rubocop -a
(snip)

Offenses:

lib/rubocop/ast/traversal.rb:41:50: W: [Corrected] Lint/RedundantCopDisableDirective:
Unnecessary disabling of Style/EvalWithLocation.
          module_eval(<<~RUBY, __FILE__, lineno) # rubocop:disable Style/EvalWithLocation
                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```

lib/rubocop/ast/traversal.rb

@@ -38,7 +38,7 @@ def def_callback(type, *signature,
                          body: self.body(signature, arity_check))
           type, *aliases = type
           lineno = caller_locations(1, 1).first.lineno
-          module_eval(<<~RUBY, __FILE__, lineno) # rubocop:disable Style/EvalWithLocation
+          module_eval(<<~RUBY, __FILE__, lineno)
             def on_#{type}(node)        # def on_send(node)
               #{body}                   #   # body ...
               nil                       #   nil