diff --git a/GPy/kern/DelayedDecorator.py b/GPy/kern/DelayedDecorator.py
deleted file mode 100644
index 32a25936..00000000
--- a/GPy/kern/DelayedDecorator.py
+++ /dev/null
@@ -1,90 +0,0 @@
-# Copyright (c) 2012, GPy authors (see AUTHORS.txt).
-# Licensed under the BSD 3-clause license (see LICENSE.txt)
-
-
-from new import instancemethod
-#this is here so that we can have nice syntatic sugar when taking gradients
-# See the transform_gradients decorator in kern
-
-class DelayedDecorator(object):
-    """Wrapper that delays decorating a function until it is invoked.
-
-    This class allows a decorator to be used with both ordinary functions and
-    methods of classes. It wraps the function passed to it with the decorator
-    passed to it, but with some special handling:
-
-      - If the wrapped function is an ordinary function, it will be decorated
-        the first time it is called.
-
-      - If the wrapped function is a method of a class, it will be decorated
-        separately the first time it is called on each instance of the class.
-        It will also be decorated separately the first time it is called as
-        an unbound method of the class itself (though this use case should
-        be rare).
-    """
-
-    def __init__(self, deco, func):
-        # The base decorated function (which may be modified, see below)
-        self._func = func
-        # The decorator that will be applied
-        self._deco = deco
-        # Variable to monitor calling as an ordinary function
-        self.__decofunc = None
-        # Variable to monitor calling as an unbound method
-        self.__clsfunc = None
-
-    def _decorated(self, cls=None, instance=None):
-        """Return the decorated function.
-
-        This method is for internal use only; it can be implemented by
-        subclasses to modify the actual decorated function before it is
-        returned. The ``cls`` and ``instance`` parameters are supplied so
-        this method can tell how it was invoked. If it is not overridden,
-        the base function stored when this class was instantiated will
-        be decorated by the decorator passed when this class was instantiated,
-        and then returned.
-
-        Note that factoring out this method, in addition to allowing
-        subclasses to modify the decorated function, ensures that the
-        right thing is done automatically when the decorated function
-        itself is a higher-order function (e.g., a generator function).
-        Since this method is called every time the decorated function
-        is accessed, a new instance of whatever it returns will be
-        created (e.g., a new generator will be realized), which is
-        exactly the expected semantics.
-        """
-        return self._deco(self._func)
-
-    def __call__(self, *args, **kwargs):
-        """Direct function call syntax support.
-
-        This makes an instance of this class work just like the underlying
-        decorated function when called directly as an ordinary function.
-        An internal reference to the decorated function is stored so that
-        future direct calls will get the stored function.
-        """
-        if not self.__decofunc:
-            self.__decofunc = self._decorated()
-        return self.__decofunc(*args, **kwargs)
-
-    def __get__(self, instance, cls):
-        """Descriptor protocol support.
-
-        This makes an instance of this class function correctly when it
-        is used to decorate a method on a user-defined class. If called
-        as a bound method, we store the decorated function in the instance
-        dictionary, so we will not be called again for that instance. If
-        called as an unbound method, we store a reference to the decorated
-        function internally and use it on future unbound method calls.
-        """
-        if instance:
-            deco = instancemethod(self._decorated(cls, instance), instance, cls)
-            # This prevents us from being called again for this instance
-            setattr(instance, self._func.__name__, deco)
-        elif cls:
-            if not self.__clsfunc:
-                self.__clsfunc = instancemethod(self._decorated(cls), None, cls)
-            deco = self.__clsfunc
-        else:
-            raise ValueError("Must supply instance or class to descriptor.")
-        return deco