Revert "PPC/s390: [sparkplug][deoptimizer] Deoptimize to baseline."

This reverts commit 94272ea5.

Reason for revert: original port was reverted

Original change's description:
> PPC/s390: [sparkplug][deoptimizer] Deoptimize to baseline.
>
> Port bdcd7d79
>
> Original Commit Message:
>
>     If we have baseline code, deoptimize to baseline instead of the
>     interpreter. The process is similar to deopting to the interpreter.
>     We just use different builtins
>     (BaselineEnterAtBytecode/BaselineEnterAtNextBytecode) instead of
>     InterpreterEnterBytecodeDispatch/InterpreterEnterBytecodeAdvance, that
>     patch an interpreter frame to a baseline frame and continue execution in
>     baseline code (based on the deopt type, at the current or next
>     bytecode).
>
> R=​pthier@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
> BUG=
> LOG=N
>
> Change-Id: I3230f3f3c6506230b2751a3389f10b022dec61a3
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2783022
> Reviewed-by: Junliang Yan <junyan@redhat.com>
> Commit-Queue: Milad Fa <mfarazma@redhat.com>
> Cr-Commit-Position: refs/heads/master@{#73618}

Change-Id: I903ad90099c4dc5f153d28aea9246933ac69972b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2784002
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#73630}

src/builtins/ppc/builtins-ppc.cc

@@ -3432,16 +3432,6 @@ void Builtins::Generate_DeoptimizationEntry_Lazy(MacroAssembler* masm) {
   Generate_DeoptimizationEntry(masm, DeoptimizeKind::kLazy);
 }
 
-void Builtins::Generate_BaselineEnterAtBytecode(MacroAssembler* masm) {
-  // Implement on this platform, https://crrev.com/c/2695591.
-  __ bkpt(0);
-}
-
-void Builtins::Generate_BaselineEnterAtNextBytecode(MacroAssembler* masm) {
-  // Implement on this platform, https://crrev.com/c/2695591.
-  __ bkpt(0);
-}
-
 void Builtins::Generate_DynamicCheckMapsTrampoline(MacroAssembler* masm) {
   FrameScope scope(masm, StackFrame::MANUAL);
   __ EnterFrame(StackFrame::INTERNAL);

src/builtins/s390/builtins-s390.cc

@@ -3431,16 +3431,6 @@ void Builtins::Generate_DeoptimizationEntry_Lazy(MacroAssembler* masm) {
   Generate_DeoptimizationEntry(masm, DeoptimizeKind::kLazy);
 }
 
-void Builtins::Generate_BaselineEnterAtBytecode(MacroAssembler* masm) {
-  // Implement on this platform, https://crrev.com/c/2695591.
-  __ bkpt(0);
-}
-
-void Builtins::Generate_BaselineEnterAtNextBytecode(MacroAssembler* masm) {
-  // Implement on this platform, https://crrev.com/c/2695591.
-  __ bkpt(0);
-}
-
 void Builtins::Generate_DynamicCheckMapsTrampoline(MacroAssembler* masm) {
   FrameScope scope(masm, StackFrame::MANUAL);
   __ EnterFrame(StackFrame::INTERNAL);