Revert "Pass public API list to class2greylist tool."

This reverts commit 9f46a30e.

Reason for revert: This change breaks the ART Buildbot (see
https://build.chromium.org/p/client.art/builders/angler-armv7-ndebug/builds/2045/steps/build%20target/logs/stdio).

Bug: 110868826
Change-Id: I78efb71738f191b432b271f723ac83e4f02e6a0d