[docs] [issue19669] remove mention of the old LaTeX docs

[Antoine Pitrou]

Antoine Pitrou added the comment:

Done in 33f58b469a4d (forgot to mention the issue id there).

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resolution:  -> fixed
stage: needs patch -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19669>
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