Fix cpu watchdog build error on Node 0.10 (#293)

Author: sjanuary

src/plugins/node/prof/nodeprofplugin.cpp

@@ -207,8 +207,6 @@ static char * ConstructData(const CpuProfile *profile) {
 	return NewCString(result.str());
 }
 
-#if NODE_VERSION_AT_LEAST(0, 11, 0) // > v0.11+
-
 // NOTE(tunniclm): Must be called from the V8/Node/uv thread
 //                 since it calls V8 APIs
 static Isolate* GetIsolate() {
@@ -219,8 +217,6 @@ static Isolate* GetIsolate() {
 	return isolate;
 }
 
-#endif
-
 // NOTE(tunniclm): Must be called from the V8/Node/uv thread
 //                 since it calls V8 APIs
 static void StartTheProfiler() {