Merge pull request #48 from FoamyGuy/fix_docs_build

remove imp module usage

Author: tannewt

docs/conf.py

@@ -22,13 +22,6 @@
     "sphinx.ext.viewcode",
 ]
 
-# Mock out micropython ourselves so that we can make const a lambda.
-import imp
-
-m = imp.new_module("micropython")
-m.const = lambda x: x
-sys.modules["micropython"] = m
-
 intersphinx_mapping = {
     "python": ("https://docs.python.org/3", None),
     "BusDevice": (