Kernel: 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."

Kernel/Graphics/Console/Console.h

@@ -59,7 +59,7 @@ public:
     virtual void write(char ch, bool critical = false) = 0;
     virtual void flush(size_t x, size_t y, size_t width, size_t height) = 0;
 
-    virtual ~Console() { }
+    virtual ~Console() = default;
 
 protected:
     Console(size_t width, size_t height)