Replace an op and a dozen C lines with 1 NQP line.

src/Perl6/World.pm

@@ -1158,7 +1158,7 @@ class Perl6::World is HLL::World {
     # Creates a new container descriptor and adds it to the SC.
     method create_container_descriptor($of, $rw, $name) {
         my $cd_type := self.find_symbol(['ContainerDescriptor']);
-        my $cd      := pir::perl6_create_container_descriptor__PPPis($cd_type, $of, $rw, $name);
+        my $cd      := $cd_type.new(:$of, :$rw, :$name);
         self.add_object($cd);
         $cd
     }

src/binder/container.c

@@ -169,15 +169,3 @@ PMC * Rakudo_cont_scalar_with_value_no_descriptor(PARROT_INTERP, PMC *value) {
     PARROT_GC_WRITE_BARRIER(interp, new_scalar);
     return new_scalar;
 }
-
-/* Creates and populates a new container descriptor. */
-PMC * Rakudo_create_container_descriptor(PARROT_INTERP, PMC *type, PMC *of, INTVAL rw, STRING *name) {
-    PMC *result = REPR(type)->allocate(interp, STABLE(type));
-    Rakudo_ContainerDescriptor *desc = (Rakudo_ContainerDescriptor *)PMC_data(result);
-    REPR(result)->initialize(interp, STABLE(result), OBJECT_BODY(result));
-    desc->of = of;
-    desc->rw = rw;
-    desc->name = name;
-    PARROT_GC_WRITE_BARRIER(interp, result);
-    return result;
-}

src/binder/container.h

@@ -23,4 +23,3 @@ void Rakudo_cont_store(PARROT_INTERP, PMC *cont, PMC *value, INTVAL type_check,
 PMC * Rakudo_cont_scalar_from_descriptor(PARROT_INTERP, PMC *container_descriptor);
 PMC * Rakudo_cont_scalar_with_value_no_descriptor(PARROT_INTERP, PMC *value);
 INTVAL Rakudo_cont_is_rw_scalar(PARROT_INTERP, PMC *check);
-PMC * Rakudo_create_container_descriptor(PARROT_INTERP, PMC *type, PMC *of, INTVAL rw, STRING *name);

src/ops/perl6.ops

@@ -934,22 +934,6 @@ inline op perl6_container_store_unchecked(in PMC, in PMC) :base_core {
 }
 
 
-/*
-
-=item perl6_create_container_descriptor
-
-Creates a container descriptor and puts in in $1. $2 is the type of the
-descriptor to create. $3 is the 'of' type, $4 is the rw flag and $5 is
-the name.
-
-=cut
-
-*/
-inline op perl6_create_container_descriptor(out PMC, in PMC, in PMC, in INT, in STR) :base_core {
-    $1 = Rakudo_create_container_descriptor(interp, $2, $3, $4, $5);
-}
-
-
 /*
 
 =item perl6_assert_bind_ok(in PMC, in PMC)