diff --git a/.flake8.cython b/.flake8.cython
deleted file mode 100644
index eed031c9..00000000
--- a/.flake8.cython
+++ /dev/null
@@ -1,4 +0,0 @@
-[flake8]
-filename = *.pyx,*.px*
-exclude = .eggs,*.egg,build
-ignore = E901,E225,E226,E227
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index ac3045ef..00000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1 +0,0 @@
-recursive-include chainermn *.pyx *.pxd *.pxi *.h