diff --git a/docs/aiohttp_doctools.py b/docs/aiohttp_doctools.py
deleted file mode 100644
index 0ee16157..00000000
--- a/docs/aiohttp_doctools.py
+++ /dev/null
@@ -1,27 +0,0 @@
-from sphinx import addnodes
-from sphinx.domains.python import PyClassmember, PyModulelevel
-
-
-class PyCoroutineMixin(object):
-    def handle_signature(self, sig, signode):
-        ret = super(PyCoroutineMixin, self).handle_signature(sig, signode)
-        signode.insert(0, addnodes.desc_annotation('coroutine ', 'coroutine '))
-        return ret
-
-
-class PyCoroutineFunction(PyCoroutineMixin, PyModulelevel):
-    def run(self):
-        self.name = 'py:function'
-        return PyModulelevel.run(self)
-
-
-class PyCoroutineMethod(PyCoroutineMixin, PyClassmember):
-    def run(self):
-        self.name = 'py:method'
-        return PyClassmember.run(self)
-
-
-def setup(app):
-    app.add_directive_to_domain('py', 'coroutinefunction', PyCoroutineFunction)
-    app.add_directive_to_domain('py', 'coroutinemethod', PyCoroutineMethod)
-    return {'version': '1.0', 'parallel_read_safe': True}