[dart2wasm] Remove deprecated mjs API functions

This is a re-land of [0] from 1.5 years ago.

[0] https://dart-review.googlesource.com/c/sdk/+/385020

Change-Id: I92747494f7c0d9dc43c09040ce06a523453994f3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/510823
Reviewed-by: Srujan Gaddam <srujzs@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>

pkg/dart2wasm/lib/js/runtime_blob.dart

@@ -21,25 +21,6 @@ export async function compile(bytes) {
   return new CompiledApp(await WebAssembly.compile(bytes, builtins), builtins);
 }
 
-// DEPRECATED: Please use `compile` or `compileStreaming` to get a compiled app,
-// use `instantiate` method to get an instantiated app and then call
-// `invokeMain` to invoke the main function.
-export async function instantiate(modulePromise, importObjectPromise) {
-  var moduleOrCompiledApp = await modulePromise;
-  if (!(moduleOrCompiledApp instanceof CompiledApp)) {
-    moduleOrCompiledApp = new CompiledApp(moduleOrCompiledApp);
-  }
-  const instantiatedApp = await moduleOrCompiledApp.instantiate(await importObjectPromise);
-  return instantiatedApp.instantiatedModule;
-}
-
-// DEPRECATED: Please use `compile` or `compileStreaming` to get a compiled app,
-// use `instantiate` method to get an instantiated app and then call
-// `invokeMain` to invoke the main function.
-export const invoke = (moduleInstance, ...args) => {
-  moduleInstance.exports.$invokeMain(args);
-}
-
 class CompiledApp {
   constructor(module, builtins) {
     this.module = module;