bop.t: Delete $SIG{__WARN__}

It is only needed for one block of tests.  Leaving the handler in
place makes it harder to add temporary diagnostics elsewhere in
the code.  (Where did my warning go?  Hey, why is ‘warn’ not work-
ing?????!!!! :-)

1 files changed, 2 insertions, 0 deletions

diff --git a/t/op/bop.t b/t/op/bop.t
index 1f96e9b67a..f9bf1c5a26 100644
--- a/t/op/bop.t
+++ b/t/op/bop.t
@@ -567,6 +567,8 @@ for (
     }
 }
 
+delete $SIG{__WARN__};
+
 my $strval;
 
 {