Remove legacy www config from Rollup build (#18016)

Author: trueadm

scripts/rollup/build.js

@@ -541,11 +541,6 @@ async function createBundle(bundle, bundleType) {
       bundle.moduleType,
       pureExternalModules
     ),
-    // We can't use getters in www.
-    legacy:
-      bundleType === FB_WWW_DEV ||
-      bundleType === FB_WWW_PROD ||
-      bundleType === FB_WWW_PROFILING,
   };
   const [mainOutputPath, ...otherOutputPaths] = Packaging.getBundleOutputPaths(
     bundleType,