Revert IDL compiler build flow to Perl, rename 'deprecated'

Source/bindings/scripts/unstable/idl_definitions.py

Index: Source/bindings/scripts/unstable/idl_definitions.py
diff --git a/Source/bindings/scripts/idl_definitions.py b/Source/bindings/scripts/unstable/idl_definitions.py
similarity index 99%
rename from Source/bindings/scripts/idl_definitions.py
rename to Source/bindings/scripts/unstable/idl_definitions.py
index c782146d7d5e56a8a19b90a18f2c0f61a389c059..a1e85f416e22592f2f05768adb151098425bc835 100644
--- a/Source/bindings/scripts/idl_definitions.py
+++ b/Source/bindings/scripts/unstable/idl_definitions.py
@@ -125,8 +125,8 @@ class IdlDefinitions(BaseIdl):
         """Returns a JSON string representing the Definitions.
 
         The JSON output should be identical with the output of the Perl parser,
-        specifically the function serializeJSON in deprecated_idl_serializer.pm,
-        which takes a Perl object created by deprecated_idl_parser.pm.
+        specifically the function serializeJSON in idl_serializer.pm,
+        which takes a Perl object created by idl_parser.pm.
         """
         # Sort so order consistent, allowing comparison of output
         if debug: