Remove unused (dead) code

Usage of urlencode was removed in 302d13b.

Usage of hybridmethod was removed in 5e77919.

powa/compat.py

@@ -39,30 +39,3 @@ def __init__(self, getter):
 
     def __get__(self, instance, owner):
         return self.getter(owner)
-
-
-class hybridmethod(object):
-    """
-    Decorator allowing to define method which behaves differently
-    if called at the instance or at the class level.
-    """
-
-    def __init__(self, class_method=None, instance_method=None):
-        self._class_method = class_method
-        self._instance_method = instance_method or class_method
-
-    def instance_method(self, instance_method):
-        """Setter for the instance method."""
-        self._instance_method = instance_method
-        return self
-
-    def class_method(self, class_method):
-        """Setter for class method."""
-        self._class_method = class_method
-        return self
-
-    def __get__(self, instance, owner):
-        if instance is None:
-            return self._class_method.__get__(owner, owner.__class__)
-        else:
-            return self._instance_method.__get__(instance, owner)

powa/dashboards.py

@@ -423,11 +423,6 @@ def initialize(self, datasource=None, params=None):
 
     @classmethod
     def to_json(cls):
-        """
-        to_json is an hybridmethod, the goal is to provide two different
-        implementations when it is used as a class (DataSource) or as
-        an instance (Widget).
-        """
         return {
             'data_url': cls.data_url,
             'name': cls.__name__,

powa/ui_methods.py

@@ -9,10 +9,6 @@
 from powa.json import JSONEncoder
 from tornado.options import options
 from tornado.web import HTTPError
-try:
-    from urllib import urlencode  # py2
-except ImportError:
-    from urllib.parse import urlencode  # py3
 
 
 def version(_):