Delete unused custom serializer

IPython/html/static/widgets/js/types.js

@@ -4,9 +4,8 b''
 define([
     "base/js/utils"
 ], function(utils){
-
     return {
-        widget_serialization: {
+        models: {
             deserialize: function deserialize_models(value, model) {
                 /**
                  * Replace model ids with models recursively.
@@ -32,19 +31,5 b' define(['
                 }
             },
         },
-        
-        list_of_numbers: {
-            deserialize: function (value, model) {
-                /* value is a DataView */
-                /* create a float64 typed array */
-                return new Float64Array(value.buffer)
-            },
-            serialize: function (value, model) {
-                return value;
-            },
-        }
     }
-
-    
-
 });

IPython/html/widgets/widget.py

@@ -111,25 +111,9 b' def _json_to_widget(x):'
 
 widget_serialization = {
     'from_json': _json_to_widget,
-    'to_json': lambda x: (_widget_to_json(x), {'serialization': ('widget_serialization', 'widgets/js/types')})
+    'to_json': lambda x: (_widget_to_json(x), {'serialization': ('models', 'widgets/js/types')})
 }
 
-def _to_binary_list(x):
-    import numpy
-    return memoryview(numpy.array(x, dtype=float)), {'serialization': ('list_of_numbers', 'widgets/js/types')}
-
-def _from_binary_list(x):
-    import numpy
-    a = numpy.frombuffer(x.tobytes(), dtype=float)
-    return list(a)
-
-list_of_numbers = {
-    'from_json': _from_binary_list,
-    'to_json': _to_binary_list
-}
-
-
-
 class Widget(LoggingConfigurable):
     #-------------------------------------------------------------------------
     # Class attributes