[Commits] [wesnoth/wesnoth] abd5df: Remove handling of maps' usage= key

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/wesnoth/wesnoth
  Commit: abd5dfdcc063c5e83a89d92d4b6511b232d42ae2
      https://github.com/wesnoth/wesnoth/commit/abd5dfdcc063c5e83a89d92d4b6511b232d42ae2
  Author: Charles Dang <exodia339 at gmail.com>
  Date:   2015-10-07 (Wed, 07 Oct 2015)

  Changed paths:
    M src/game_events/action_wml.cpp
    M src/map.cpp
    M src/map.hpp

  Log Message:
  -----------
  Remove handling of maps' usage= key