[TD]clean up from recent preferences/return PRs

src/Mod/TechDraw/App/LandmarkDimension.cpp

@@ -166,7 +166,6 @@ int LandmarkDimension::getRefType() const
 
 DrawViewPart* LandmarkDimension::getViewPart() const
 {
-    DrawViewPart* result = nullptr;
     std::vector<App::DocumentObject*> refs2d = References2D.getValues();
     App::DocumentObject* obj = refs2d.front();
     DrawViewPart* dvp = dynamic_cast<DrawViewPart*>(obj);

src/Mod/TechDraw/App/ShapeExtractor.cpp

@@ -115,7 +115,6 @@ TopoDS_Shape ShapeExtractor::getShapes(const std::vector<App::DocumentObject*> l
     BRep_Builder builder;
     TopoDS_Compound comp;
     builder.MakeCompound(comp);
-    bool found = false;
     for (auto& s:sourceShapes) {
         if (s.IsNull()) {
             continue;