Remove explicit default destructors (#157)

From CppCoreGuidelines:

Rule of Zero: C.20: If you can avoid defining default operations, do.
C.52: Use inheriting constructors to import constructors into a derived class that does not need further explicit initialization.
DRY forward and using declarations.
Miscellaneous:

Fix format.sh to output examples with normalised paths in sorted order.

Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>

src/ftxui/component/radiobox.cpp

@@ -38,7 +38,6 @@ class RadioboxBase : public ComponentBase {
       option_->style_unchecked = L"( )";
 #endif
   }
-  ~RadioboxBase() override = default;
 
  private:
   Element Render() override {