libtracker-data: get rid of unused TRACKER_DB_LOCATION_SYS_TMP_DIR
libtracker-data: get rid of unused TRACKER_DB_LOCATION_SYS_TMP_DIR

And don't create a /tmp/tracker-$user directory.

outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker