Hardwareinfo: remove platform sign key

Sign with default key

Test: manually, connect to wifi, reboot and check logcat, no new error
      message after apply patch
      adb logcat |egrep "Hardware|System.err"
Bug: 162295589
Signed-off-by: Denny cy Lee <dennycylee@google.com>
Change-Id: Iafb8f978981a03020974804f121f04aec7bf334f
Merged-in: Iafb8f978981a03020974804f121f04aec7bf334f
1 file changed
tree: eac7510390690ad25fa206753ed65abe685d4315
  1. private/
  2. public/
  3. tracking_denials/
  4. vendor/
  5. OWNERS
  6. sunfish-sepolicy.mk