quopri: unify 2 and 3, add types

stdlib/2/quopri.pyi

@@ -1,8 +0,0 @@
-# Stubs for quopri (Python 2)
-#
-# NOTE: This dynamically typed stub was automatically generated by stubgen.
-
-def encode(input, output, quotetabs, header=0): ...
-def encodestring(s, quotetabs=0, header=0): ...
-def decode(input, output, header=0): ...
-def decodestring(s, header=0): ...