Use @internal with js/timers.ts

js/assets.ts

@@ -94,7 +94,4 @@ export const assetSourceCode: { [key: string]: string } = {
   // Static definitions
   "typescript.d.ts": typescriptDts,
   "types.d.ts": typesDts,
-
-  // TODO(ry) Remove the following when possible. It's a workaround.
-  "msg_generated.d.ts": "",
 };

js/timers.ts

@@ -21,6 +21,7 @@ interface Timer {
 
 const timers = new Map<number, Timer>();
 
+/** @internal */
 export function onMessage(msg: fbs.TimerReady) {
   const timerReadyId = msg.id();
   const timerReadyDone = msg.done();

js/tsconfig.generated.json

@@ -6,7 +6,8 @@
   "extends": "../tsconfig.json",
   "compilerOptions": {
     "declaration": true,
-    "emitDeclarationOnly": true
+    "emitDeclarationOnly": true,
+    "stripInternal": true
   },
   "files": [
     "../node_modules/typescript/lib/lib.esnext.d.ts",