CppTools: modernize

Change-Id: Iaf02e4d026f1ac8b216833d83cd7a735e21ff60a
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/cpptools/usages.h

@@ -37,7 +37,7 @@ namespace CppTools {
 class Usage
 {
 public:
-    Usage() {}
+    Usage() = default;
     Usage(Utils::SmallStringView path, int line, int column)
         : path(QString::fromUtf8(path.data(), int(path.size()))),
           line(line),