Revert of [turbofan] Implemented the TruncateFloat32ToInt64 TurboFan operator.

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index 5f9fc7a76952ad81ff9dfc2afb1fa216a644198a..fc901253e5859b122f590155fffb5c8948b4af57 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -437,9 +437,6 @@
   }
   Node* ChangeFloat64ToUint32(Node* a) {
     return AddNode(machine()->ChangeFloat64ToUint32(), a);
-  }
-  Node* TruncateFloat32ToInt64(Node* a) {
-    return AddNode(machine()->TruncateFloat32ToInt64(), a);
   }
   Node* TruncateFloat64ToInt64(Node* a) {
     return AddNode(machine()->TruncateFloat64ToInt64(), a);