attestation: remove sed modification of attestation.conf

After the changes in
https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2105818,
a sed modification is made unconditionally to attestationd.conf. Make
the changes directly in attestationd.conf instead.

BUG=none
TEST=emerge attestation and verify that attestationd.conf has "started tpm_managerd" instead of "started tcsd"

Cq-Depend: chromium:2288071
Change-Id: I4e491284080521e395641964784a0bd5575a9cba
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2288249
Reviewed-by: Leo Lai <cylai@google.com>
Tested-by: Nicholas Bishop <nbishop@neverware.com>
Commit-Queue: Leo Lai <cylai@google.com>
1 file changed