MMS: Update Polish translation

PS2: Minor fix (groups index)

Change-Id: I1175da22a7c8d0fa7b572499ee12eb34538e91b3
Merge "MMS: Update Polish translation" into cm-10.2
Cleanup: Remove variables that were never read.

Change-Id: Ie5c0a52ce75dbed129ed499fa6babb49b325fd8f
Merge remote-tracking branch 'cm/cm-10.2' into DJL10.2