Cleaned up python widget classes

IPython/html/widgets/bool.py

@@ -1,12 +1,9 @@
-import os
-
 from base import Widget
 from IPython.utils.traitlets import Unicode, Bool, List
 
 class BoolWidget(Widget):
     target_name = Unicode('BoolWidgetModel')
     default_view_name = Unicode('CheckboxView')
-    js_requirements = List(["static/notebook/js/widgets/bool.js"])
     _keys = ['value', 'description', 'disabled']
     
     value = Bool(False)

IPython/html/widgets/container.py

@@ -1,12 +1,7 @@
-import os
-
 from base import Widget
-from IPython.utils.traitlets import Unicode, List
-from IPython.utils.javascript import display_all_js
+from IPython.utils.traitlets import Unicode
 
 class ContainerWidget(Widget):
     target_name = Unicode('container_widget')
     default_view_name = Unicode('ContainerView')
-    js_requirements = List(["static/notebook/js/widgets/container.js"])
-    
-    _keys = []
+    

IPython/html/widgets/selection.py

@@ -1,13 +1,9 @@
-import os
-
 from base import Widget
 from IPython.utils.traitlets import Unicode, List, Bool
-from IPython.utils.javascript import display_all_js
 
 class SelectionWidget(Widget):
     target_name = Unicode('SelectionWidgetModel')
     default_view_name = Unicode('DropdownView')
-    js_requirements = List(["static/notebook/js/widgets/selection.js"])
     _keys = ['value', 'values', 'disabled']
 
     value = Unicode()

IPython/html/widgets/string.py

@@ -1,14 +1,10 @@
-import os
-
 from base import Widget
 from IPython.utils.traitlets import Unicode, Bool, List
-from IPython.utils.javascript import display_all_js
 
 class StringWidget(Widget):
     target_name = Unicode('StringWidgetModel')
     default_view_name = Unicode('TextboxView')
-    js_requirements = List(["static/notebook/js/widgets/string.js"])
-    _keys = ['value', 'row_count', 'disabled']
+    _keys = ['value', 'disabled']
     
     value = Unicode()
     disabled = Bool(False) # Enable or disable user changes