diff --git a/Makefile b/Makefile
index a3fd399a..d1be6840 100644
--- a/Makefile
+++ b/Makefile
@@ -39,6 +39,7 @@ clean: FORCE
 	@printf "\n\033[36m--- $@: Clean ---\033[0m\n"
 	-rm -rf .pytest_cache
 	-rm -f .coverage*
+	-rm -rf .mypy_cache
 	-rm -rf .tox
 	-rm -rf dist
 	-rm -rf build
diff --git a/wc b/wc
deleted file mode 100644
index e69de29b..00000000
diff --git a/xargs b/xargs
deleted file mode 100644
index e69de29b..00000000