Remove one obsolete hlint override

During the preparations for 2.6, we cleaned up the codebase to use
newer exceptions (e.g. commits 30d25dd8, 79ac58fa), so we can now drop
this override.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>