[perl #123554] stop checking the message

Sith IV/UV larger than Size_t, the overflow can be detected earlier,
so the message varies.

The error is still reported with a croak(), so it can be captured.

Author: tonycoz

t/op/repeat.t

@@ -6,7 +6,7 @@ BEGIN {
 }
 
 require './test.pl';
-plan(tests => 49);
+plan(tests => 48);
 
 # compile time
 
@@ -176,4 +176,3 @@ is($#that_array, 28, 'list repetition propagates lvalue cx to its lhs');
 
 # see [perl #123554]
 ok(!eval '33x~3', "eval 33x~3 should panic, not crash perl");
-like($@, qr/^panic: memory wrap/, "check it's a panic");