Revert "[v6.d REVIEW] Use preciser test routines"

This reverts commit 6fa5f64.

`use "t/spec/packages"`, and hence Test::Util, cannot be used
here  because the 'can change directory and require a module'
test relies on t/spec/packages not being loaded.

S11-modules/require.t

@@ -1,14 +1,12 @@
 use v6;
 
 use lib $?FILE.IO.parent(2), $?FILE.IO.parent.add("lib");
-use Test::Util;
 use MONKEY-SEE-NO-EVAL;
 
-my $required-Test = (require Test <&plan &is &lives-ok &skip &todo &cmp-ok
+my $required-Test = (require Test <&plan &is &lives-ok &skip &todo
                                   &nok &throws-like &eval-lives-ok &ok>);
 plan 34;
 
-
 # RT #126100
 {
     is $required-Test.gist, '(Test)', "successful require PACKAGE returns PACKAGE";
@@ -107,11 +105,10 @@ eval-lives-ok q|BEGIN require Fancy::Utilities;|, 'require works at BEGIN';
 eval-lives-ok q|BEGIN require Fancy::Utilities <&allgreet>;|,'require can import at BEGIN';
 
 {
-    require "S11-modules/GlobalOuter.pm";
-    cmp-ok ::('GlobalOuter'), '!~~', Failure, "got outer symbol";
-    ok     ::('GlobalOuter').load, "call method that causes a require";
-    fails-like { ::('GlobalInner') }, X::NoSuchSymbol,
-        "did not find inner symbol";
+        require "S11-modules/GlobalOuter.pm";
+        nok ::('GlobalOuter') ~~ Failure, "got outer symbol";
+        ok  ::('GlobalOuter').load, "call method that causes a require";
+        ok ::('GlobalInner') ~~ Failure, "Did not find inner symbol";
 }
 
 # Test that symbols under a core package namespace (Cool::) are merged.