Fixed Node.js error "ReferenceError: global is not defined" in Node.js version 0.12.2

Author: NikolayIT

Open Judge System/Workers/OJS.Workers.ExecutionStrategies/NodeJsPreprocessExecuteAndCheckExecutionStrategy.cs

@@ -47,7 +47,6 @@ private string JsCodeTemplate
 COUNTER_HTTP_SERVER_RESPONSE = undefined;
 COUNTER_HTTP_CLIENT_REQUEST = undefined;
 COUNTER_HTTP_CLIENT_RESPONSE = undefined;
-global = undefined;
 process.argv = undefined;
 process.versions = undefined;
 process.env = { NODE_DEBUG: false };
@@ -88,7 +87,6 @@ private string JsCodeTemplate
 delete COUNTER_HTTP_SERVER_RESPONSE;
 delete COUNTER_HTTP_CLIENT_REQUEST;
 delete COUNTER_HTTP_CLIENT_RESPONSE;
-delete global;
 delete process.argv;
 delete process.versions;
 delete GLOBAL;