Strip FrontendBase to a minimum

mopidy/frontends/base.py

@@ -1,40 +1,5 @@
 class BaseFrontend(object):
     """
     Base class for frontends.
-
-    :param core_queue: queue for messaging the core
-    :type core_queue: :class:`multiprocessing.Queue`
-    :param backend: the backend
-    :type backend: :class:`mopidy.backends.base.Backend`
     """
-
-    def __init__(self, core_queue, backend):
-        self.core_queue = core_queue
-        self.backend = backend
-
-    def start(self):
-        """
-        Start the frontend.
-
-        *MAY be implemented by subclass.*
-        """
-        pass
-
-    def destroy(self):
-        """
-        Destroy the frontend.
-
-        *MAY be implemented by subclass.*
-        """
-        pass
-
-    def process_message(self, message):
-        """
-        Process messages for the frontend.
-
-        *MUST be implemented by subclass.*
-
-        :param message: the message
-        :type message: dict
-        """
-        raise NotImplementedError
+    pass