Replace #define ... with pragma once

src/main/Models.h

@@ -1,5 +1,5 @@
-#ifndef MODELS_H
-#define MODELS_H
+#pragma once
+
 #include <map>
 #include <bayesnet/BaseClassifier.h>
 #include <bayesnet/ensembles/AODE.h>
@@ -39,4 +39,3 @@ namespace platform {
         Registrar(const std::string& className, function<bayesnet::BaseClassifier* (void)> classFactoryFunction);
     };
 }
-#endif