Kernel: Accepting sockets don't need to retain the client sockets.

This is all taken care of by the respective FileDescriptors.
Before this patch, we were leaking every single socket, not great!

Kernel/LocalSocket.h

@@ -27,7 +27,6 @@ private:
     virtual bool is_local() const override { return true; }
 
     RetainPtr<FileDescriptor> m_file;
-    RetainPtr<LocalSocket> m_peer;
 
     bool m_bound { false };
     int m_accepted_fds_open { 0 };

Kernel/Socket.cpp

@@ -49,7 +49,6 @@ RetainPtr<Socket> Socket::accept()
     auto client = m_pending.take_first();
     ASSERT(!client->is_connected());
     client->m_connected = true;
-    m_clients.append(client.copy_ref());
     return client;
 }
 

Kernel/Socket.h

@@ -74,7 +74,6 @@ private:
     timeval m_send_deadline { 0, 0 };
 
     Vector<RetainPtr<Socket>> m_pending;
-    Vector<RetainPtr<Socket>> m_clients;
 };
 
 class SocketHandle {