Bug#885267: coccinelle: Depends on unmaintained pygtk

[eamanu <eamanu@yaerobi.com>]

Source: coccinelle
Version: 1.0.4.deb-3

Hi everybody,

This issue was forward to upstream [1].

The dependency will be remove from coccinelle soon

[1] https://systeme.lip6.fr/pipermail/cocci/2020-February/006836.html

Cheers,
eamanu