CppTools: modernize

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

src/plugins/cpptools/cppindexingsupport.cpp

@@ -27,16 +27,13 @@
 
 namespace CppTools {
 
-CppIndexingSupport::~CppIndexingSupport()
-{
-}
+CppIndexingSupport::~CppIndexingSupport() = default;
 
 SymbolSearcher::SymbolSearcher(QObject *parent)
     : QObject(parent)
 {
 }
 
-SymbolSearcher::~SymbolSearcher()
-{}
+SymbolSearcher::~SymbolSearcher() = default;
 
 } // namespace CppTools