brillo: Remove icu.dat file from the Brillo image.

icu.dat is a 22 MB internationalization data file not used by Brillo.
Since Brillo runs in a resource constrained environment, remove
this file for Brillo images.

BUG=25792311
TEST=manual test

Change-Id: I179d65c8667aa36b735f19abcbdf23920d016d87
1 file changed