Revert "Refactor dispatch handling (#2452)"

Due to performance regression:
https://github.com/denoland/deno/commit/dc60fe9f300043f191286ef804a365e16e455f87#commitcomment-33943711

This reverts commit dc60fe9f300043f191286ef804a365e16e455f87.

1 files changed, 4 insertions, 3 deletions

diff --git a/core/libdeno/libdeno.d.ts b/core/libdeno/libdeno.d.ts
index 093e846ab..1bc7367d9 100644
--- a/core/libdeno/libdeno.d.ts
+++ b/core/libdeno/libdeno.d.ts
@@ -12,13 +12,14 @@ interface EvalErrorInfo {
   thrown: any;
 }
 
-declare type MessageCallbackInternal = (msg: Uint8Array) => void;
+declare interface MessageCallback {
+  (msg: Uint8Array): void;
+}
 
 declare interface DenoCore {
-  recv(cb: MessageCallbackInternal): void;
+  recv(cb: MessageCallback): void;
 
   send(
-    cmdId: number,
     control: null | ArrayBufferView,
     data?: ArrayBufferView
   ): null | Uint8Array;