Revert "Fix S26 WHY tests for GLR"

This reverts commit 4fabc1e.

Author: hoelzro

S26-documentation/why-both.t

@@ -65,7 +65,7 @@ class Sheep {
 
 test-both(Sheep, 'a sheep', 'or is it?');
 
-my $wool-attr = Sheep.^attributes.grep({ .name eq '$!wool' }).list[0];
+my $wool-attr = Sheep.^attributes.grep({ .name eq '$!wool' })[0];
 
 test-both($wool-attr, 'usually white', 'not very dirty');
 

S26-documentation/why-leading.t

@@ -75,7 +75,7 @@ class Sheep {
     method roar { 'roar!' }
 }
 
-my $wool-attr = Sheep.^attributes.grep({ .name eq '$!wool' }).list[0];
+my $wool-attr = Sheep.^attributes.grep({ .name eq '$!wool' })[0];
 my $roar-method = Sheep.^lookup('roar');
 
 test-leading(Sheep,'a sheep');

S26-documentation/why-trailing.t

@@ -69,7 +69,7 @@ class Sheep {
 }
 
 {
-    my $wool-attr = Sheep.^attributes.grep({ .name eq '$!wool' }).list[0];
+    my $wool-attr = Sheep.^attributes.grep({ .name eq '$!wool' })[0];
     my $roar-method = Sheep.^lookup('roar');
     test-trailing(Sheep, 'a sheep');
     test-trailing($wool-attr, 'usually white');