Don't use WHAT

It's mentioned elsewhere in this file, but doesn't add anything
in particular to this example which already has .^name

Author: coke

doc/Language/classtut.pod6

@@ -695,7 +695,6 @@ we can ask it a few questions:
     =begin code :preamble<my $o; class Employee {}; class GeekCook {}>
     if $o ~~ Employee { say "It's an employee" };
     if $o ~~ GeekCook { say "It's a geeky cook" };
-    say $o.WHAT
     say $o.perl;
     say $o.^methods(:local)».name.join(', ');
     say $o.^name;