Remove a global variable that is no longer used

See #123, 0ba45bf2aec48072b78cc41d76a053700e753ec5
Ranks screen: display Close link in rank title bar

Hidden at first, but displayed in place of the Edit link while the rank
is being edited, but hasn’t yet been changed.

Also displays the Edit link at all times, not just when hovering over
the title bar. Makes the UI more discoverable.

Fixes #
Remove a new rank when Cancel button is clicked

Fixes #194
Add help docs to the ranks admin screen

Fixes #192
Remove a string that is no longer used

See #190
Update the translation files

See #192, #190