Libraries: Use default constructors/destructors in LibWebSocket

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/Libraries/LibWebSocket/Impl/WebSocketImpl.cpp

@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2021, Dex♪ <dexes.ttp@gmail.com>
  * Copyright (c) 2022, Ali Mohammad Pur <mpfard@serenityos.org>
+ * Copyright (c) 2022, the SerenityOS developers.
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -14,10 +15,6 @@ WebSocketImpl::WebSocketImpl(Core::Object* parent)
 {
 }
 
-WebSocketImpl::~WebSocketImpl()
-{
-}
-
 void WebSocketImpl::connect(ConnectionInfo const& connection_info)
 {
     VERIFY(!m_socket);

Userland/Libraries/LibWebSocket/Impl/WebSocketImpl.h

@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2021, Dex♪ <dexes.ttp@gmail.com>
  * Copyright (c) 2022, Ali Mohammad Pur <mpfard@serenityos.org>
+ * Copyright (c) 2022, the SerenityOS developers.
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -19,7 +20,7 @@ class WebSocketImpl : public Core::Object {
     C_OBJECT(WebSocketImpl);
 
 public:
-    virtual ~WebSocketImpl() override;
+    virtual ~WebSocketImpl() override = default;
     explicit WebSocketImpl(Core::Object* parent = nullptr);
 
     void connect(ConnectionInfo const&);

Userland/Libraries/LibWebSocket/WebSocket.cpp

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2021, Dex♪ <dexes.ttp@gmail.com>
+ * Copyright (c) 2022, the SerenityOS developers.
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -25,10 +26,6 @@ WebSocket::WebSocket(ConnectionInfo connection)
 {
 }
 
-WebSocket::~WebSocket()
-{
-}
-
 void WebSocket::start()
 {
     VERIFY(m_state == WebSocket::InternalState::NotStarted);

Userland/Libraries/LibWebSocket/WebSocket.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2021, Dex♪ <dexes.ttp@gmail.com>
+ * Copyright (c) 2022, the SerenityOS developers.
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -25,7 +26,7 @@ class WebSocket final : public Core::Object {
     C_OBJECT(WebSocket)
 public:
     static NonnullRefPtr<WebSocket> create(ConnectionInfo);
-    virtual ~WebSocket() override;
+    virtual ~WebSocket() override = default;
 
     URL const& url() const { return m_connection.url(); }