devel/kf5-ktexteditor: remove unnecessary dependencies

• QtScript: https://invent.kde.org/frameworks/ktexteditor/-/commit/878797830dbd3b29bd5dcd8241c17ea20fb6914e
• IconThemes: https://invent.kde.org/frameworks/ktexteditor/-/commit/c7d64230aa34db6dd2edfdc18e15e7189470fd73
• QtXmlPatterns: https://invent.kde.org/frameworks/ktexteditor/-/commit/891ee97d541f805b0130ffdec01c35f755ddd261