src: remove unused variable

PR-URL: #25481
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: cjihrig

src/node_native_module.cc

@@ -85,7 +85,6 @@ void NativeModuleLoader::GetCacheUsage(
 
 void NativeModuleLoader::ModuleIdsGetter(
     Local<Name> property, const PropertyCallbackInfo<Value>& info) {
-  Local<Context> context = info.GetIsolate()->GetCurrentContext();
   Isolate* isolate = info.GetIsolate();
 
   const NativeModuleRecordMap& source_ =