[Euler] Comment out a time-consuming trace.
[Euler] Comment out a time-consuming trace.

This way it executes much faster - less than 2s in Niecza on my Debian
Stable x86-64 VM on a Core i3 host.

stmuk/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,agentzh/perl6-examples,shlomif/perl6-examples,agentzh/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,shlomif/perl6-examples,agentzh/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples