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

doc/Language/mop.pod6

@@ -51,16 +51,7 @@ These are introspective macros that resemble method calls.
 Metamethods are generally named with ALLCAPS, and it is considered good
 style to avoid creating your own methods with ALLCAPS names.  This will avoid
 conflicts with any metamethods that may appear in future versions of the
-language.  Note that if you really must use a method which has an ALLCAPS
-name, use quotes around the method name to safely call it indirectly:
-
-    #| THIS IS A CLASS FOR SHOUTING THINGS
-    class MY-CLASSES-ARE-ALL-CAPS {
-        method WHY { "I DON'T KNOW" }
-    }
-    my $c = MY-CLASSES-ARE-ALL-CAPS.new;
-    say $c.WHY      # "THIS IS A CLASS FOR SHOUTING THINGS"
-    say $c."WHY"()  # "I DON'T KNOW"
+language.  
 
 =head2 X<WHAT|syntax,WHAT>