Removes unneeded __all__ definitions in subpackages.

bonobo/nodes/io/file.py

@@ -4,11 +4,6 @@ from bonobo.config.processors import ContextProcessor
 from bonobo.constants import NOT_MODIFIED
 from bonobo.util.objects import ValueHolder
 
-__all__ = [
-    'FileReader',
-    'FileWriter',
-]
-
 
 class FileHandler(Configurable):
     """Abstract component factory for file-related components.

bonobo/nodes/io/json.py

@@ -3,10 +3,6 @@ import json
 from bonobo.config.processors import ContextProcessor
 from .file import FileWriter, FileReader
 
-__all__ = [
-    'JsonWriter',
-]
-
 
 class JsonHandler():
     eol = ',\n'