remove unneeded imports from iocontrol

diff --git a/src/add/iocontrol.py b/src/add/iocontrol.py
index de1c938ea39efb5778c6cc69a32b0632be9ccc2c..524bccb50f6d1af8785af14913b53766edabdd04 100644 (file)
--- a/src/add/iocontrol.py
+++ b/src/add/iocontrol.py
@@ -79,14 +79,12 @@
     slave) could be derived from ControlBase, for example.
 """
 
-from nmigen import Signal, Cat, Const, Mux, Module, Value, Elaboratable
+from nmigen import Signal, Cat, Const, Module, Value, Elaboratable
 from nmigen.cli import verilog, rtlil
 from nmigen.hdl.rec import Record
 
-from abc import ABCMeta, abstractmethod
 from collections.abc import Sequence, Iterable
 from collections import OrderedDict
-import inspect
 
 import nmoperator