Remove docs for grafana datasource plugin for now - #7384

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[Linkspector] reported by reviewdog 🐶 Cannot reach https://github.com/superdb/superdb-python Status: 404 Raw Output: message:"Cannot reach https://github.com/superdb/superdb-python Status: 404" location:{path:"book/src/dev/libraries/python.md" range:{start:{line:3 column:5} end:{line:3 column:74}}} severity:ERROR source:{name:"linkspector" url:"https://github.com/UmbrellaDocs/linkspector"}

[Linkspector] reported by reviewdog 🐶 Cannot reach https://github.com/superdb/sqllogic-ztests Status: 404 Raw Output: message:"Cannot reach https://github.com/superdb/sqllogic-ztests Status: 404" location:{path:"book/src/super-sql/sql/intro.md" range:{start:{line:351 column:5} end:{line:351 column:71}}} severity:ERROR source:{name:"linkspector" url:"https://github.com/UmbrellaDocs/linkspector"}

[Linkspector] reported by reviewdog 🐶 Cannot reach https://github.com/superdb/zui Status: 404 Raw Output: message:"Cannot reach https://github.com/superdb/zui Status: 404" location:{path:"README.md" range:{start:{line:108 column:1} end:{line:108 column:50}}} severity:ERROR source:{name:"linkspector" url:"https://github.com/UmbrellaDocs/linkspector"}