fix -Wextra in Import

src/Mod/Import/App/ImportOCAF.cpp

@@ -97,7 +97,8 @@ void ImportOCAF::loadShapes()
     loadShapes(pDoc->Main(), TopLoc_Location(), default_name, "", false);
 }
 
-void ImportOCAF::loadShapes(const TDF_Label& label, const TopLoc_Location& loc, const std::string& defaultname, const std::string& assembly, bool isRef)
+void ImportOCAF::loadShapes(const TDF_Label& label, const TopLoc_Location& loc,
+                            const std::string& defaultname, const std::string& /*assembly*/, bool isRef)
 {
     int hash = 0;
     TopoDS_Shape aShape;

src/Mod/Import/App/StepShape.cpp

@@ -40,7 +40,7 @@
 
 using namespace Import;
 
-StepShape::StepShape(const char* fileName)
+StepShape::StepShape()
 {
 }
 

src/Mod/Import/App/StepShape.h

@@ -37,7 +37,7 @@ namespace Import
 class ImportExport StepShape 
 {
 public:
-    StepShape(const char* fileName="");
+    StepShape();
     ~StepShape();
 
     int read(const char* fileName);