[Chicken] Remove code for Chicken

We dropped support for it in SWIG 4.0.0 and nobody has stepped forward
to revive it in over 2 years.

See #2009.
This commit is contained in:
Olly Betts 2021-05-13 10:54:04 +12:00
commit 5f38f9cc78
107 changed files with 10 additions and 5763 deletions

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