pidgin/pidgin

Remove purple_chat_user_[sg]et_ui_data.

2020-08-22, Elliott Sales de Andrade
d587dad11411
Remove purple_chat_user_[sg]et_ui_data.

Remove `purple_chat_user_[gs]et_ui_data`.
Remove `deleting-chat-user` signal. It's unused now, and just a substitute for a finalization notification.

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/83/
#define PIDGIN_ICON 104
#define PIDGIN_TRAY_AVAILABLE_4BIT 105
#define PIDGIN_TRAY_AWAY_4BIT 106
#define PIDGIN_TRAY_BUSY_4BIT 107
#define PIDGIN_TRAY_XA_4BIT 108
#define PIDGIN_TRAY_OFFLINE_4BIT 109
#define PIDGIN_TRAY_CONNECTING_4BIT 110
#define PIDGIN_TRAY_PENDING_4BIT 111
#define PIDGIN_TRAY_INVISIBLE_4BIT 112