keymaster HAL users don't need delete_keypair

The keymaster HAL implementations don't need the delete_keypair method,
but keystore currently throws an error when it's not implemented. This
causes problems with at least the OpenSSL software implementation.

Bug: 6985351
Change-Id: I3d7f7dce2a6d4aad38c20f555ab16aa45f1823b8
1 file changed
tree: f54c67f716beb8e4eda51d16595f1ad159899e9c
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/