[bugfix] Remove redundant test

Author: chris-evolvedbinary

exist-core/src/test/xquery/xquery3/fnCollationKey.xqm

@@ -25,14 +25,6 @@ module namespace fnck="http://exist-db.org/xquery/test/function_collation_key";
 
 declare namespace test="http://exist-db.org/xquery/xqsuite";
 
-declare
-    %test:assertTrue
-function fnck:default-equal-case() {
-    let $first := fn:collation-key("a")
-    let $second := fn:collation-key("a")
-    return $first eq $second
-};
-
 declare
     %test:assertTrue
 function fnck:default-equal() {