Remove get_preview_module.

    And replace calls with calls to load_preview_module.

cms/djangoapps/contentstore/views/preview.py

@@ -105,7 +105,7 @@ def preview_module_system(request, preview_id, descriptor):
         # TODO (cpennington): Do we want to track how instructors are using the preview problems?
         track_function=lambda event_type, event: None,
         filestore=descriptor.system.resources_fs,
-        get_module=partial(get_preview_module, request, preview_id),
+        get_module=partial(load_preview_module, request, preview_id),
         render_template=render_from_lms,
         debug=True,
         replace_urls=partial(static_replace.replace_static_urls, data_directory=None, course_namespace=descriptor.location),
@@ -115,28 +115,13 @@ def preview_module_system(request, preview_id, descriptor):
     )
 
 
-def get_preview_module(request, preview_id, descriptor):
-    """
-    Returns a preview XModule at the specified location. The preview_data is chosen arbitrarily
-    from the set of preview data for the descriptor specified by Location
-
-    request: The active django request
-    preview_id (str): An identifier specifying which preview this module is used for
-    location: A Location
-    """
-
-    return load_preview_module(request, preview_id, descriptor)
-
-
 def load_preview_module(request, preview_id, descriptor):
     """
-    Return a preview XModule instantiated from the supplied descriptor, instance_state, and shared_state
+    Return a preview XModule instantiated from the supplied descriptor.
 
     request: The active django request
     preview_id (str): An identifier specifying which preview this module is used for
     descriptor: An XModuleDescriptor
-    instance_state: An instance state string
-    shared_state: A shared state string
     """
     system = preview_module_system(request, preview_id, descriptor)
     try: