Fix some Clang -Wunused-but-set-variable warnings

(cherry picked from commit e771804e783513a746734474f90c1cd653bb8297)

editor/editor_properties.cpp

@@ -810,7 +810,6 @@ public:
 				const int vofs = (grid_size.height - h) / 2;
 
 				int layer_index = 0;
-				int block_index = 0;
 
 				Point2 arrow_pos;
 
@@ -882,8 +881,6 @@ public:
 							break;
 						}
 					}
-
-					++block_index;
 				}
 
 				if ((expansion_rows != prev_expansion_rows) && expanded) {

editor/import/resource_importer_scene.cpp

@@ -1148,14 +1148,12 @@ void ResourceImporterScene::_replace_owner(Node *p_node, Node *p_scene, Node *p_
 }
 
 void ResourceImporterScene::_add_shapes(Node *p_node, const List<Ref<Shape>> &p_shapes) {
-	int idx = 0;
 	for (const List<Ref<Shape>>::Element *E = p_shapes.front(); E; E = E->next()) {
 		CollisionShape *cshape = memnew(CollisionShape);
 		cshape->set_shape(E->get());
 		p_node->add_child(cshape);
 
 		cshape->set_owner(p_node->get_owner());
-		idx++;
 	}
 }
 

editor/project_manager.cpp

@@ -529,7 +529,6 @@ private:
 
 					Vector<String> failed_files;
 
-					int idx = 0;
 					while (ret == UNZ_OK) {
 						//get filename
 						unz_file_info info;
@@ -569,7 +568,6 @@ private:
 							}
 						}
 
-						idx++;
 						ret = unzGoToNextFile(pkg);
 					}
 

editor/script_create_dialog.cpp

@@ -204,18 +204,14 @@ String ScriptCreateDialog::_validate_path(const String &p_path, bool p_file_must
 
 	bool found = false;
 	bool match = false;
-	int index = 0;
 	for (List<String>::Element *E = extensions.front(); E; E = E->next()) {
 		if (E->get().nocasecmp_to(extension) == 0) {
-			//FIXME (?) - changing language this way doesn't update controls, needs rework
-			//language_menu->select(index); // change Language option by extension
 			found = true;
 			if (E->get() == ScriptServer::get_language(language_menu->get_selected())->get_extension()) {
 				match = true;
 			}
 			break;
 		}
-		index++;
 	}
 
 	if (!found) {