[translations] Doc-ja: update snippets

[Yoshiki Sawada <sawada.yoshiki@xxxxxxxxx>]

Hello Francisco and all,

I want to translate snippets.
So, as the first step, I decided to add "piano-template-simple.texidoc"
to "ja/texidocs" and delete "piano-template-with-centered-dynamics.texidoc"
(it is already unused).

I added/deleted snippet files, ran "makelsr.py", committed it
and created a patch.
I will edit the file again to adjust the 40-digit committish
after someone applies my patch to "translation" branch.

Does it make sense?

Thanks,
Yoshiki Sawada (Japan)

Attachment: 0001-Doc-ja-update-snippets.patch
Description: Binary data