Remove unused local variable

Change-Id: I0e085a51a127ae9294762c1999fb466d0f62db0b
Add namespace in cache

$ns was added in Change-Id: I2e8545ceb40385d9d4e9b709c46c8b7348d5773a, but
had not been implemented.

Change-Id: Iadc35ee48d6071408147245d898014fb79d4cbe5
Remove unused parameter in handlePriorityLanguages()

Also updated the caller.

Change-Id: Icd67f4a3bda0aae76187bf5ed6e6719e178ddcf6
Remove unused parameter

There's one caller that didn't use the optional parameter.

Change-Id: I3a125c8f9d768445b2aee3b7cfd9ba007470150b