Fixes for clang-tidy: bugprone-unused-local-non-trivial-variable

Author: thehans

src/core/Expression.cc

@@ -228,7 +228,6 @@ Range::Range(Expression *begin, Expression *step, Expression *end, const Locatio
  * during normal operating, not runtime during error handling.
  */
 static void NOINLINE print_range_depr(const Location& loc, const std::shared_ptr<const Context>& context){
-  std::string locs = loc.toRelativeString(context->documentRoot());
   LOG(message_group::Deprecated, loc, context->documentRoot(), "Using ranges of the form [begin:end] with begin value greater than the end value is deprecated");
 }
 

src/gui/Measurement.cc

@@ -76,7 +76,6 @@ QString Measurement::statemachine(QPoint mouse)
         if(obj1.type == SelectionType::SELECTION_LINE && obj2.type == SelectionType::SELECTION_LINE) dist =calculateSegSegDistance(obj1.p1, obj1.p2,obj2.p1,obj2.p2,lat);
         if(!std::isnan(dist)) {
           return QString("Distance is %1").arg(fabs(dist));
-              std::stringstream ss;
         }
         qglview->selected_obj.clear();
         qglview->shown_obj.clear();

src/io/import_obj.cc

@@ -61,7 +61,6 @@ std::unique_ptr<PolySet> import_obj(const std::string& filename, const Location&
         return PolySet::createEmpty();
       }
     } else if (boost::regex_search(line, results, ex_f) && results.size() >= 2) {
-      std::string args=results[1];
       std::vector<std::string> words;
       boost::split(words, results[1], boost::is_any_of(" \t"));
       builder.beginPolygon(words.size());