Remove reference to test for Issue4138 because TypedArray polyfills no longer exist

tests/unit/compile-js.hxml

@@ -1,10 +1,3 @@
--p src
---main unit.issues.Issue4138
--js bin/Issue4138_Worker.js
--D worker
-
---next
-
 compile-each.hxml
 unit.TestMain
 -js bin/unit.js