Simplify pipeThrough

Author: MattiasBuelens

baselines/dom.generated.d.ts

@@ -11877,7 +11877,7 @@ interface ReadableStream<R = any> {
     cancel(reason?: any): Promise<void>;
     getReader(options: { mode: "byob" }): ReadableStreamBYOBReader;
     getReader(): ReadableStreamDefaultReader<R>;
-    pipeThrough<T extends ReadableStream>({ writable, readable }: { writable: WritableStream<R>, readable: T }, options?: PipeOptions): T;
+    pipeThrough<T>({ writable, readable }: { writable: WritableStream<R>, readable: ReadableStream<T> }, options?: PipeOptions): ReadableStream<T>;
     pipeTo(dest: WritableStream<R>, options?: PipeOptions): Promise<void>;
     tee(): [ReadableStream<R>, ReadableStream<R>];
 }

baselines/webworker.generated.d.ts

@@ -2331,7 +2331,7 @@ interface ReadableStream<R = any> {
     cancel(reason?: any): Promise<void>;
     getReader(options: { mode: "byob" }): ReadableStreamBYOBReader;
     getReader(): ReadableStreamDefaultReader<R>;
-    pipeThrough<T extends ReadableStream>({ writable, readable }: { writable: WritableStream<R>, readable: T }, options?: PipeOptions): T;
+    pipeThrough<T>({ writable, readable }: { writable: WritableStream<R>, readable: ReadableStream<T> }, options?: PipeOptions): ReadableStream<T>;
     pipeTo(dest: WritableStream<R>, options?: PipeOptions): Promise<void>;
     tee(): [ReadableStream<R>, ReadableStream<R>];
 }

inputfiles/overridingTypes.json

@@ -2520,7 +2520,7 @@
                         },
                         "pipeThrough": {
                             "override-signatures": [
-                                "pipeThrough<T extends ReadableStream>({ writable, readable }: { writable: WritableStream<R>, readable: T }, options?: PipeOptions): T"
+                                "pipeThrough<T>({ writable, readable }: { writable: WritableStream<R>, readable: ReadableStream<T> }, options?: PipeOptions): ReadableStream<T>"
                             ]
                         },
                         "pipeTo": {