Disable pylint duplicate code verification.

Although it is an interesting setup, it currently has too many false
positives, disable comments are not working for duplicate-code, and
there are some expected duplications in the modules.

setup.cfg

@@ -36,7 +36,8 @@ disable =
     missing-module-docstring,
     missing-class-docstring,
     missing-function-docstring,
-    wrong-import-position
+    wrong-import-position,
+    duplicate-code
 
 [pylint.BASIC]
 good-names = ex, i, j, k, Run, _, e, x, dn, cn, ip, os, unicode