Moved collate to Any since it's not experimental

Refs #2434.

Author: JJ

doc/Language/experimental.pod6

@@ -26,29 +26,6 @@ not yet rendered properly.
 
 =item X<B<pack>|pack> [TBD]
 
-=head1 Collation
-
-As of Rakudo 2018.11, there is no longer any need to use
-C<experimental :collation> any more, as the feature standardized.
-
-The L<collate> and L<<«&infix:<coll>»|/language/operators#index-entry-infix_coll>>
-methods are no longer experimental. However, they are affected by the
-X<B<$*COLLATION>|$*COLLATION>, which configures the four X<collation levels>.
-While the Primary, Secondary and Tertiary mean different things for different scripts,
-for the Latin script used in English they mostly correspond with Primary being Alphabetic,
-Secondary being Diacritics and Tertiary being Case.
-
-In the example below you can see how when we disable tertiary collation which in
-Latin script generally is for case, and also disable quaternary which breaks
-any ties by checking the codepoint values of the strings, we get B<Same> back
-for B<A> and B<a>:
-
-    use experimental :collation;
-    $*COLLATION.set(:quaternary(False), :tertiary(False));
-    say 'a' coll 'A'; #OUTPUT: «Same␤»
-    say ('a','A').collate == ('A','a').collate; # OUTPUT: «True␤»
-
-The $*COLLATION API could change at any time, so use it with caution.
 
 =end pod
 

doc/Type/Any.pod6

@@ -1033,7 +1033,22 @@ my %hash = 'aa' => 'value', 'Za' => 'second';
 say %hash.collate; # (aa => value Za => second);
 =end code
 
-C<collate> behavior can be changed by using the (so far experimental) L<C<$*COLLATION>|/language/experimental#index-entry-%24%2ACOLLATION-%24%2ACOLLATION> dynamic variable. Please refer to its description in the L<experimental features page|/language/experimental> for further information.
+These methods are affected by the
+X<B<$*COLLATION>|$*COLLATION>, which configures the four X<collation levels>.
+While the Primary, Secondary and Tertiary mean different things for different scripts,
+for the Latin script used in English they mostly correspond with Primary being Alphabetic,
+Secondary being Diacritics and Tertiary being Case.
+
+In the example below you can see how when we disable tertiary collation which in
+Latin script generally is for case, and also disable quaternary which breaks
+any ties by checking the codepoint values of the strings, we get B<Same> back
+for B<A> and B<a>:
+
+    use experimental :collation;
+    $*COLLATION.set(:quaternary(False), :tertiary(False));
+    say 'a' coll 'A'; #OUTPUT: «Same␤»
+    say ('a','A').collate == ('A','a').collate; # OUTPUT: «True␤»
+
 
 =head2 method cache