LibIPC: Stop sending client ID to clients

The client ID is not useful to normal clients anymore, so stop telling
everyone what their ID is.

Userland/Libraries/LibAudio/ClientConnection.cpp

@@ -36,8 +36,7 @@ ClientConnection::ClientConnection()
 
 void ClientConnection::handshake()
 {
-    auto response = send_sync<Messages::AudioServer::Greet>();
-    set_my_client_id(response->client_id());
+    send_sync<Messages::AudioServer::Greet>();
 }
 
 void ClientConnection::enqueue(const Buffer& buffer)

Userland/Libraries/LibDesktop/Launcher.cpp

@@ -60,8 +60,7 @@ class LaunchServerConnection : public IPC::ServerConnection<LaunchClientEndpoint
 public:
     virtual void handshake() override
     {
-        auto response = send_sync<Messages::LaunchServer::Greet>();
-        set_my_client_id(response->client_id());
+        send_sync<Messages::LaunchServer::Greet>();
     }
 
 private:

Userland/Libraries/LibGUI/Clipboard.cpp

@@ -39,8 +39,7 @@ class ClipboardServerConnection : public IPC::ServerConnection<ClipboardClientEn
 public:
     virtual void handshake() override
     {
-        auto response = send_sync<Messages::ClipboardServer::Greet>();
-        set_my_client_id(response->client_id());
+        send_sync<Messages::ClipboardServer::Greet>();
     }
 
 private:

Userland/Libraries/LibGUI/Notification.cpp

@@ -37,8 +37,7 @@ class NotificationServerConnection : public IPC::ServerConnection<NotificationCl
 public:
     virtual void handshake() override
     {
-        auto response = send_sync<Messages::NotificationServer::Greet>();
-        set_my_client_id(response->client_id());
+        send_sync<Messages::NotificationServer::Greet>();
     }
 
 private:

Userland/Libraries/LibGUI/WindowServerConnection.cpp

@@ -63,7 +63,6 @@ static void set_system_theme_from_anonymous_buffer(Core::AnonymousBuffer buffer)
 void WindowServerConnection::handshake()
 {
     auto response = send_sync<Messages::WindowServer::Greet>();
-    set_my_client_id(response->client_id());
     set_system_theme_from_anonymous_buffer(response->theme_buffer());
     Desktop::the().did_receive_screen_rect({}, response->screen_rect());
 }

Userland/Libraries/LibIPC/ServerConnection.h

@@ -49,17 +49,11 @@ public:
 
     virtual void handshake() = 0;
 
-    void set_my_client_id(int id) { m_my_client_id = id; }
-    int my_client_id() const { return m_my_client_id; }
-
     virtual void die() override
     {
         // Override this function if you don't want your app to exit if it loses the connection.
         exit(0);
     }
-
-private:
-    int m_my_client_id { -1 };
 };
 
 }

Userland/Libraries/LibImageDecoderClient/Client.cpp

@@ -37,8 +37,7 @@ Client::Client()
 
 void Client::handshake()
 {
-    auto response = send_sync<Messages::ImageDecoderServer::Greet>();
-    set_my_client_id(response->client_id());
+    send_sync<Messages::ImageDecoderServer::Greet>();
 }
 
 void Client::handle(const Messages::ImageDecoderClient::Dummy&)

Userland/Libraries/LibProtocol/Client.cpp

@@ -38,8 +38,7 @@ Client::Client()
 
 void Client::handshake()
 {
-    auto response = send_sync<Messages::ProtocolServer::Greet>();
-    set_my_client_id(response->client_id());
+    send_sync<Messages::ProtocolServer::Greet>();
 }
 
 bool Client::is_supported_protocol(const String& protocol)

Userland/Libraries/LibWeb/WebContentClient.cpp

@@ -45,8 +45,7 @@ void WebContentClient::die()
 
 void WebContentClient::handshake()
 {
-    auto response = send_sync<Messages::WebContentServer::Greet>();
-    set_my_client_id(response->client_id());
+    send_sync<Messages::WebContentServer::Greet>();
 }
 
 void WebContentClient::handle(const Messages::WebContentClient::DidPaint& message)