[issue20225] Argument Clinic: simplify METH_NOARGS generated code

[Georg Brandl]

New submission from Georg Brandl:

For METH_NOARGS, you can get rid of the separate _impl function.  This makes the generated code much smaller.

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messages: 207943
nosy: georg.brandl
priority: normal
severity: normal
status: open
title: Argument Clinic: simplify METH_NOARGS generated code

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20225>
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