Revert -Wunreachable-code workaround.

Bug: http://b/31104323
Test: Built/ran ART successfully on sailfish.

This reverts commit 813b9c47d8952b3f02a6032d79d66433c981d030, which
added a workaround for Clang mistriggering -Wunreachable-code.

Change-Id: I46636c9b4f574a870c1f95b6160d05f2a75f8ab8
1 file changed