make_chroot: Remove unused toolchain overlay support

cros_sdk can pass in an additional overlay tarball to unpack on top of
the chroot.  This hasn't been used in cros_sdk since 2016 and is being
removed, so no need to support it in, either.

TEST=cros_sdk --create

Change-Id: I1f585fd5f2d0991c43b804f30d34c2a0a68337a6
Commit-Ready: ChromeOS CL Exonerator Bot <>
Tested-by: Benjamin Gordon <>
Reviewed-by: Mike Frysinger <>
1 file changed