Remove link to defunct book

Author: coke

doc/Language/faq.rakudoc

@@ -125,9 +125,6 @@ Here are some available books, in alphabetical order:
 
 =item L<Learning to program with Raku: First Steps|https://www.amazon.com/gp/product/B07221XCVL>, by JJ Merelo
 
-=item L<Metagenomics|https://www.gitbook.com/book/kyclark/metagenomics/details>,
-by Ken Youens-Clark
-
 =item L<Parsing with Perl 6 Regexes and Grammars|https://smile.amazon.com/dp/1484232275/>, by Moritz Lenz
 
 =item L<Perl 6 at a Glance|https://deeptext.media/perl6-at-a-glance/>,

xt/pws/words.pws

@@ -788,7 +788,6 @@ metacharacters
 metaclass
 metaclasses
 metadocumentation
-metagenomics
 metalevel
 metamethod
 metamethods