Revert "Baklava finalization special"

This reverts commit 45fc16c6.

Baklava has been finalized and the prebuilts/sdk/36 directory has been
created, and the version bumps have propagated to trunk. We no longer
need to special case the call to metalava.

Bug: 379105862
Test: presubmit
Ignore-AOSP-First: special call to metalava does not exist in AOSP
Change-Id: I2a49e917ce7f5ec43a189dd0fe910433a1c95332