PPC/s390: [cleanup][ptr-compr] Remove Decompressed Signed/Any register to register

Port 3b0329ab

Original Commit Message:

    Since the old pipeline has been removed
    (https://chromium-review.googlesource.com/c/v8/v8/+/1903435), these
    opcodes and methods are unused.

R=solanes@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: I68b1dcc54c6bbaf873f277d4a1620eee6d96864c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1925555Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#65073}

src/compiler/backend/ppc/instruction-codes-ppc.h

@@ -129,9 +129,6 @@ namespace compiler {
   V(PPC_StoreDouble)                 \
   V(PPC_ByteRev32)                   \
   V(PPC_ByteRev64)                   \
-  V(PPC_DecompressSigned)            \
-  V(PPC_DecompressPointer)           \
-  V(PPC_DecompressAny)               \
   V(PPC_CompressSigned)              \
   V(PPC_CompressPointer)             \
   V(PPC_CompressAny)                 \

src/compiler/backend/ppc/instruction-scheduler-ppc.cc

@@ -110,9 +110,6 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kPPC_BitcastDoubleToInt64:
     case kPPC_ByteRev32:
     case kPPC_ByteRev64:
-    case kPPC_DecompressSigned:
-    case kPPC_DecompressPointer:
-    case kPPC_DecompressAny:
     case kPPC_CompressSigned:
     case kPPC_CompressPointer:
     case kPPC_CompressAny:

src/compiler/backend/s390/instruction-codes-s390.h

@@ -166,9 +166,6 @@ namespace compiler {
   V(S390_StoreReverseSimd128)               \
   V(S390_StoreFloat32)                      \
   V(S390_StoreDouble)                       \
-  V(S390_DecompressSigned)                  \
-  V(S390_DecompressPointer)                 \
-  V(S390_DecompressAny)                     \
   V(S390_CompressSigned)                    \
   V(S390_CompressPointer)                   \
   V(S390_CompressAny)                       \

src/compiler/backend/s390/instruction-scheduler-s390.cc

@@ -140,9 +140,6 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kS390_LoadAndTestWord64:
     case kS390_LoadAndTestFloat32:
     case kS390_LoadAndTestFloat64:
-    case kS390_DecompressSigned:
-    case kS390_DecompressPointer:
-    case kS390_DecompressAny:
     case kS390_CompressSigned:
     case kS390_CompressPointer:
     case kS390_CompressAny: