Remove some unwanted changes

Author: Jin Huang

bazel/test_external/BUILD

@@ -3,7 +3,6 @@ load("@emsdk//emscripten_toolchain:wasm_rules.bzl", "wasm_cc_binary")
 cc_binary(
     name = "hello-world",
     srcs = ["hello-world.cc"],
-    linkopts = ["--bind"],
 )
 
 wasm_cc_binary(

bazel/test_external/hello-world.cc

@@ -1,21 +1,5 @@
 #include <iostream>
 
-#ifdef __EMSCRIPTEN__
-#include <emscripten.h>
-#include <emscripten/bind.h>
-using namespace emscripten;
-#endif
-
-void sayHello() {
-  std::cout << "hello" << std::endl;
-}
-
-#ifdef __EMSCRIPTEN__
-EMSCRIPTEN_BINDINGS(hello) {
-  function("sayHello", &sayHello);
-}
-#endif
-
 int main(int argc, char** argv) {
   std::cout << "hello world!" << std::endl;
   return 0;