chromium: Remove older recipes

Signed-off-by: Khem Raj <raj.khem@gmail.com>
libxi_1.7.1.bbappend: Remove

This bbappend was generating native version of libxi
which was used by older chromium recipes but they are
gone. So let this go as well.

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>