This flag allowed for building with an OpenJDK 7 toolchain. It was used for build bot builds that now work with an OpenJDK 8 toolchain. Hence, this feature is no longer required. This CL drops it. Bug: 27583810 Test: Treehugger build succeeds. Change-Id: Iba9cf12cff2597fa70aa9999e8a6bda190f29f3c