tests: stop promoting perl warnings to fatal errors

While this is useful on CI to highlight issues in the scripts, it's a
recipe for pain when enabled on users' builds.

Suggested-by: Leon Timmermans
Ref: #16128

diff --git a/tests/runtests.pl b/tests/runtests.pl
index da9caebfc2c51b9288f5732b78d28094d51588c3..e28fd56e50d5e7ebfa912de3df60bb07ce8d1b34 100755 (executable)
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -57,8 +57,7 @@
 # given, this won't be a problem.
 
 use strict;
-# Promote all warnings to fatal
-use warnings FATAL => 'all';
+use warnings;
 use 5.006;
 use POSIX qw(strftime);