src: fix -Wunused-but-set-variable warnings

PR-URL: #18205
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: bnoordhuis

src/node_file.cc

@@ -516,7 +516,6 @@ static void InternalModuleStat(const FunctionCallbackInfo<Value>& args) {
 
 static void Stat(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
-  Local<Context> context = env->context();
 
   CHECK_GE(args.Length(), 1);
 
@@ -540,7 +539,6 @@ static void Stat(const FunctionCallbackInfo<Value>& args) {
 
 static void LStat(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
-  Local<Context> context = env->context();
 
   CHECK_GE(args.Length(), 1);