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/Net/Socket.cpp

@@ -37,9 +37,7 @@ Socket::Socket(int domain, int type, int protocol)
     set_origin(Process::current());
 }
 
-Socket::~Socket()
-{
-}
+Socket::~Socket() = default;
 
 void Socket::set_setup_state(SetupState new_setup_state)
 {