Remove an unused assignment.

Issue found by cppcheck.

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56316 75b3775d-3801-0410-9e12-e2e43121521d
Remove an unused assignment.

Issue found by cppcheck.

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56317 75b3775d-3801-0410-9e12-e2e43121521d
Remove an unused variable.

Issue found by cppcheck.

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56318 75b3775d-3801-0410-9e12-e2e43121521d
Remove an unused variable.

Issue found by cppcheck.

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56319 75b3775d-3801-0410-9e12-e2e43121521d