[turbofan] Float32Abs and Float64Abs are supported by all backends.

src/compiler/arm64/instruction-selector-arm64.cc

Index: src/compiler/arm64/instruction-selector-arm64.cc
diff --git a/src/compiler/arm64/instruction-selector-arm64.cc b/src/compiler/arm64/instruction-selector-arm64.cc
index f653520c36e95c6cd3524fd267af9affea43b26d..52bd9790c0b2a3a4bc201177b30c0990b5389071 100644
--- a/src/compiler/arm64/instruction-selector-arm64.cc
+++ b/src/compiler/arm64/instruction-selector-arm64.cc
@@ -1871,10 +1871,8 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
-  return MachineOperatorBuilder::kFloat32Abs |
-         MachineOperatorBuilder::kFloat32Max |
+  return MachineOperatorBuilder::kFloat32Max |
          MachineOperatorBuilder::kFloat32Min |
-         MachineOperatorBuilder::kFloat64Abs |
          MachineOperatorBuilder::kFloat64Max |
          MachineOperatorBuilder::kFloat64Min |
          MachineOperatorBuilder::kFloat64RoundDown |