hg: jdk/sandbox: 8250556: revert JVMCI part of JDK-8230395

[chris.hegarty at oracle.com]

Changeset: 0d5c9dffe1f6
Author:    dnsimon
Date:      2020-07-27 22:59 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/0d5c9dffe1f6

8250556: revert JVMCI part of JDK-8230395
Reviewed-by: never, dholmes

! src/hotspot/share/jvmci/jvmciCompilerToVM.cpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp
! src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/CompilerToVM.java
! src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCIRuntime.java