Utilities: Use default constructors/destructors

https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules

"The compiler is more likely to get the default semantics right and
you cannot implement these functions better than the compiler."

Userland/Utilities/test.cpp

@@ -30,7 +30,7 @@ bool g_there_was_an_error = false;
 
 class Condition {
 public:
-    virtual ~Condition() { }
+    virtual ~Condition() = default;
     virtual bool check() const = 0;
 };