The following deprecated API got removed:
 wnck_screen_get_workspace_index
 wnck_screen_get_workspace_neighbor
 wnck_pager_set_screen
 wnck_tasklist_set_minimum_width
 wnck_tasklist_get_minimum_width
 wnck_tasklist_set_minimum_height
 wnck_tasklist_get_minimum_height
 wnck_tasklist_set_screen
 wnck_gtk_window_set_dock_type
 wnck_create_window_action_menu

The following API don't take a WnckScreen argument anymore:
 wnck_pager_new
 wnck_tasklist_new