Remove ImageItem, Paintable and use unified image provider.

src/spectraluser.h

@@ -1,44 +1,18 @@
 #ifndef SpectralUser_H
 #define SpectralUser_H
 
-#include "paintable.h"
 #include "room.h"
 #include "user.h"
 
 #include <QObject>
-#include <QPointer>
 
 using namespace QMatrixClient;
 
-class UserPaintable : public Paintable {
-  Q_OBJECT
- public:
-  UserPaintable(User* parent) : Paintable(parent), m_user(parent) {}
-
-  QImage image(int dimension) override {
-    if (!m_user) return {};
-    return m_user->avatar(dimension);
-  }
-  QImage image(int width, int height) override {
-    if (!m_user) return {};
-    return m_user->avatar(width, height);
-  }
-
- private:
-  User* m_user;
-};
-
 class SpectralUser : public User {
   Q_OBJECT
-  Q_PROPERTY(Paintable* paintable READ paintable CONSTANT)
  public:
   SpectralUser(QString userId, Connection* connection)
-      : User(userId, connection), m_paintable(this) {}
-
-  Paintable* paintable() { return &m_paintable; }
-
- private:
-  UserPaintable m_paintable;
+      : User(userId, connection) {}
 };
 
 #endif  // SpectralUser_H