[ja] remove all keygen HTML element occurrences

[leon-win]

Description

This PR removes all occurrences of obsolete keygen HTML element in ja locale.

Related issues and pull requests

Relates to mdn/content#26902

[github-actions]

Preview URLs

• /ja/docs/Glossary/Void_element
• /ja/docs/Web/HTML/Attributes/disabled
• /ja/docs/Web/HTML/Attributes
• /ja/docs/Web/HTML/Content_categories

Flaws (21)

Note! 2 documents with no flaws that don't need to be listed. 🎉

URL: /ja/docs/Web/HTML/Attributes
Title: HTML 属性リファレンス
Flaw count: 5

• macros:
  • /ja/docs/Web/HTML/Element/applet does not exist
  • /ja/docs/Web/HTML/Element/applet does not exist
  • /ja/docs/Web/HTML/Element/applet does not exist
  • /ja/docs/Web/HTML/Element/applet does not exist
  • /ja/docs/Web/HTML/Element/bgsound redirects to /ja/docs/Web/HTML/Element/audio

---

URL: /ja/docs/Web/HTML/Content_categories
Title: コンテンツカテゴリー
Flaw count: 16

• macros:
  • /ja/docs/Web/HTML/Element/command does not exist
  • /ja/docs/Web/HTML/Element/command does not exist
  • /ja/docs/Web/HTML/Element/h1 redirects to /ja/docs/Web/HTML/Element/Heading_Elements
  • /ja/docs/Web/HTML/Element/h2 redirects to /ja/docs/Web/HTML/Element/Heading_Elements
  • /ja/docs/Web/HTML/Element/h3 redirects to /ja/docs/Web/HTML/Element/Heading_Elements
  • and 10 more flaws omitted
• translation_differences:
  • Differences in the important macros (0 in common of 1 possible)

External URLs (8)

URL: /ja/docs/Web/HTML/Attributes
Title: HTML 属性リファレンス

• https://dom.spec.whatwg.org/ (1 time)
• https://html.spec.whatwg.org/dev/interaction.html (1 time)
• https://html.spec.whatwg.org/multipage/common-microsyntaxes.html (1 time)
• https://html.spec.whatwg.org/multipage/urls-and-fetching.html (2 times)
• https://w3c.github.io/html-media-capture/ (1 time)

---

URL: /ja/docs/Glossary/Void_element
Title: Void element （空要素）

• https://html.spec.whatwg.org/multipage/ (1 time)
• https://www.w3.org/TR/MathML3/ (1 time)
• https://www.w3.org/TR/SVG2/ (1 time)

(comment last updated: 2023-11-28 10:51:02)

[mfuji09]

LGTM.