Revert of [turbofan] Implemented the TruncateFloat32ToInt64 TurboFan operator.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index 1296499e910d0b2746a9154ebe00afe953362d1b..1b129707c10cd6890ffa5fb7998ca1e70dad0b9e 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -847,8 +847,6 @@
       return MarkAsWord32(node), VisitChangeFloat64ToInt32(node);
     case IrOpcode::kChangeFloat64ToUint32:
       return MarkAsWord32(node), VisitChangeFloat64ToUint32(node);
-    case IrOpcode::kTruncateFloat32ToInt64:
-      return MarkAsWord64(node), VisitTruncateFloat32ToInt64(node);
     case IrOpcode::kTruncateFloat64ToInt64:
       return MarkAsWord64(node), VisitTruncateFloat64ToInt64(node);
     case IrOpcode::kTruncateFloat64ToUint64:
@@ -1097,11 +1095,6 @@
 }
 
 
-void InstructionSelector::VisitTruncateFloat32ToInt64(Node* node) {
-  UNIMPLEMENTED();
-}
-
-
 void InstructionSelector::VisitTruncateFloat64ToInt64(Node* node) {
   UNIMPLEMENTED();
 }