Revert "One more use of CLONE-LIST-DECONTAINERIZED"

This reverts commit 371434f.

$args-without is initialized with $!path.Str, which this patch dropped,
rending Proc::Async unusable.

src/core/Proc/Async.pm

@@ -162,6 +162,12 @@ my class Proc::Async {
         $!started = True;
 
         my %ENV := $ENV ?? $ENV.hash !! %*ENV;
+
+        my Mu $args-without := nqp::list(nqp::decont($!path.Str));
+        for @!args.eager {
+            nqp::push($args-without, nqp::decont(.Str));
+        }
+
         $!exit_promise = Promise.new;
 
         my Mu $callbacks := nqp::hash();
@@ -183,7 +189,7 @@ my class Proc::Async {
         nqp::bindkey($callbacks, 'write', True) if $.w;
 
         $!process_handle := nqp::spawnprocasync($scheduler.queue,
-            CLONE-LIST-DECONTAINERIZED(@!args),
+            $args-without,
             $*CWD.Str,
             CLONE-HASH-DECONTAINERIZED(%ENV),
             $callbacks,