docs: remove out of date admonition (#2114)

Lumen Yang

2025-09-05 a4028289aae22f2a073b2837c3a85d9fc4a86087

 quartz/plugins/transformers/latex.ts

@@ -59,8 +59,6 @@
              },
            ],
          }
        default:
          return { css: [], js: [] }
      }
    },
  }