update comment

packages/common/client-utils/bufferBrowser.d.ts

@@ -9,10 +9,8 @@
  * This file is needed for compatibility with TypeScript's Node10 module resolution. In most other packages it is
  * auto-generated by `flub generate entrypoints` in @fluid-tools/build-cli, and is thus gitignored in most packages.
  *
- * However, this package is unique in that it re-exports some legacy exports from other packages directly in a source
- * file legacy.ts, and does not need to use API trimming or `flub generate entrypoints` to create the trimmed API rollup
- * files. Since `flub generate entrypoints` also creates the Node10-compatible type stubs, this file is committed
- * directly so the legacy.d.ts files produced by TypeScript itself are not overridden.
+ * However, this package is unique in that it does not need to use API trimming or `flub generate entrypoints`,
+ * but instead uses conditional exports to isomorphically support both Node and browser environments.
  */
 
 export * from "./lib/bufferBrowser.js";