[Tizen] Remove Application running check during uninstallation

There is no need to have an explicit logic in xwalkctl  to kill
the runnning app if it is being uninstalled.

Pkgmgr-server has the responsibility to kill an app if there is
a User request to uninstall it.

BUG=XWALK-2418
Merge pull request #2369 from pozdnyakov/Remove_terminate_if_running

[Tizen] Remove Application running check during uninstallation