Remove Benchmark.pm
Remove Benchmark.pm

It's not used by any of the code in the examples project anymore.

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