core: Remove unused string

This was mistakenly added on https://github.com/CyanogenMod/android_frameworks_base/commit/9337d51a9ea31ab77392a3988446aadb57d4eba0

Change-Id: I6b2b2c0dabafa3537b8c5152e0393ef5c828e64b
Merge "core: Remove unused string" into cm-11.0
base: PT-BR translations

Change-Id: I72b62b52e3619724d4f4252dfd8971bda2b40a4d
Merge "base: PT-BR translations" into cm-11.0
framework/base: JA translations

Change-Id: I229259d8a811c1f95595dce3675c674ac71392f3
core: AST translations

Change-Id: Ida232ed4cd21040da589281274907e27f76b184a
Merge "framework/base: JA translations" into cm-11.0