diff --git a/src/ifcparse/IfcFile.h b/src/ifcparse/IfcFile.h
index f613c938c9..75f6e944d8 100644
--- a/src/ifcparse/IfcFile.h
+++ b/src/ifcparse/IfcFile.h
@@ -174,7 +174,7 @@ public:
 	IfcUtil::IfcBaseClass* instance_by_id(int id);
 
 	/// Returns the entity with the specified GlobalId
-	virtual IfcUtil::IfcBaseClass* instance_by_guid(const std::string& guid);
+	IfcUtil::IfcBaseClass* instance_by_guid(const std::string& guid);
 
 	/// Performs a depth-first traversal, returning all entity instance
 	/// attributes as a flat list. NB: includes the root instance specified
@@ -216,20 +216,6 @@ public:
 	void build_inverses();
 };
 
-template <typename Schema>
-class IFC_PARSE_API IfcFileWithSchema : public IfcFile {
-public:
-	std::pair<typename Schema::IfcNamedUnit*, double> getUnit(typename Schema::IfcUnitEnum::Value unit_type) {
-		std::pair<IfcUtil::IfcBaseClass*, double> unit_info = IfcFile::getUnit(Schema::IfcUnitEnum::ToString(unit_type));
-		return std::make_pair(unit_info.first->template as<typename Schema::IfcNamedUnit>(), unit_info.second);
-	}
-	
-	/// Returns the entity with the specified GlobalId
-	virtual typename Schema::IfcRoot* instance_by_guid(const std::string& guid) {
-		return IfcFile::instance_by_guid(guid)->template as<typename Schema::IfcRoot>();
-	}
-};
-
 #ifdef WITH_IFCXML
 IFC_PARSE_API IfcFile* parse_ifcxml(const std::string& filename);
 #endif