Remove bogus example and associated text.
Remove bogus example and associated text.

The example for the over-riding of the MOP methods couldn't possibly
work and the assertion that supplying the name in quotes differs in
dispatch from the unquoted one is incorrect.

Closes #847

perl6/doc,gfldex/doc,tbrowder/doc,MasterDuke17/doc,stmuk/doc,antquinonez/doc,stmuk/doc,gfldex/doc,antquinonez/doc,dmaestro/doc,jonathanstowe/doc,perl6/doc,dmaestro/doc,antquinonez/doc,antquinonez/doc,dmaestro/doc,stmuk/doc,stmuk/doc,stmuk/doc,jonathanstowe/doc,gfldex/doc,antquinonez/doc,dmaestro/doc,MasterDuke17/doc,jonathanstowe/doc,perl6/doc,jonathanstowe/doc,tbrowder/doc,dmaestro/doc,MasterDuke17/doc,tbrowder/doc,perl6/doc,jonathanstowe/doc,MasterDuke17/doc,gfldex/doc,perl6/doc,tbrowder/doc,gfldex/doc