Code cleanup: - removed dead code - made code more explicit

Jean-Noel Rouvignac

28.18.2015 b8d5ff44d76b120e90630e321482bf14721ea54f

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relation.plugin.user-friendly-name=Wtyczka
user-friendly-name=\u015acie\u017cka Wtyczek
relation.plugin.user-friendly-plural-name=Wtyczki