tests/functional2/lang: Migrate builtins.toXML

Change-Id: I31f47b9953ef0370dd8e57f6e43ee32d278c3663

tests/functional/lang/eval-okay-toxml.exp

@@ -1 +0,0 @@
-"<?xml version='1.0' encoding='utf-8'?>\n<expr>\n  <attrs>\n    <attr name=\"a\">\n      <string value=\"s\" />\n    </attr>\n  </attrs>\n</expr>\n"

tests/functional/lang/eval-okay-toxml.nix

@@ -1,3 +0,0 @@
-# Make sure the expected XML output is produced; in particular, make sure it
-# doesn't contain source location information.
-builtins.toXML { a = "s"; }

tests/functional/lang/eval-okay-toxml2.exp

@@ -1 +0,0 @@
-"<?xml version='1.0' encoding='utf-8'?>\n<expr>\n  <list>\n    <string value=\"ab\" />\n    <int value=\"10\" />\n    <attrs>\n      <attr name=\"x\">\n        <string value=\"x\" />\n      </attr>\n      <attr name=\"y\">\n        <string value=\"x\" />\n      </attr>\n    </attrs>\n  </list>\n</expr>\n"

tests/functional/lang/eval-okay-toxml2.nix

@@ -1 +0,0 @@
-builtins.toXML [("a" + "b") 10 (rec {x = "x"; y = x;})]