Revert "Support class unloading in dex2oat for quicken multidex"

This reverts commit 0b1c341d2d89a483142cd14bdeb4650ab00184f1.

New test Dex2oatDeterminism.UnloadCompile fails on bots gtest-debug-gc and friends.

Change-Id: Ib101fc4390d90f88fe017d8482775d5e975f2ccb
12 files changed