probe unibuild based on presence of /usr/share/chromeos-config

JSON config is dead and being removed in CL:2065957. Drop this code
which requires the JSON config.

This was only ever used for specifying CHROMEOS_RELEASE_UNIBUILD=1 in
the lsb_release, so we never actually needed the list of supported
model names anyway.

TEST=build_image for unibuild, lsb_release contains

Cq-Depend: chromium:2078954
Change-Id: I5f9853a1966c0cff792dc09ded298ae7c30aa40c
Tested-by: Jack Rosenthal <>
Reviewed-by: C Shapiro <>
Reviewed-by: Chris McDonald <>
Commit-Queue: Jack Rosenthal <>
1 file changed