docs: remove out of date admonition (#2114)

Lumen Yang

2025-09-05 a4028289aae22f2a073b2837c3a85d9fc4a86087

 quartz.layout.ts

@@ -35,6 +35,7 @@
          grow: true,
        },
        { Component: Component.Darkmode() },
        { Component: Component.ReaderMode() },
      ],
    }),
    Component.Explorer(),