Cleanup: shared isolate

src/wasm/wasm-module.cc

Index: src/wasm/wasm-module.cc
diff --git a/src/wasm/wasm-module.cc b/src/wasm/wasm-module.cc
index f297d749fec39e5fa3e9c8b325272b3ef635e552..6fc0008dd14139cffefc7b75dd37490e3e7f4f00 100644
--- a/src/wasm/wasm-module.cc
+++ b/src/wasm/wasm-module.cc
@@ -318,8 +318,7 @@ bool AllocateGlobals(ErrorThrower* thrower, Isolate* isolate,
 }  // namespace
 
 WasmModule::WasmModule()
-    : shared_isolate(nullptr),
-      module_start(nullptr),
+    : module_start(nullptr),
       module_end(nullptr),
       min_mem_pages(0),
       max_mem_pages(0),
@@ -625,7 +624,6 @@ MaybeHandle<JSObject> WasmModule::Instantiate(Isolate* isolate,
                                               Handle<JSArrayBuffer> memory) {
   HistogramTimerScope wasm_instantiate_module_time_scope(
       isolate->counters()->wasm_instantiate_module_time());
-  this->shared_isolate = isolate;  // TODO(titzer): have a real shared isolate.
   ErrorThrower thrower(isolate, "WasmModule::Instantiate()");
   Factory* factory = isolate->factory();