[turbofan] Properly initialize mutable heap numbers in literals.

src/compiler/js-create-lowering.h

Index: src/compiler/js-create-lowering.h
diff --git a/src/compiler/js-create-lowering.h b/src/compiler/js-create-lowering.h
index d9d184b8e2981a598fcb1cf6ecccb144262358eb..52e7ec254ad2301e6eb10b42be7ca9cc6c690e86 100644
--- a/src/compiler/js-create-lowering.h
+++ b/src/compiler/js-create-lowering.h
@@ -70,7 +70,6 @@ class JSCreateLowering final : public AdvancedReducer {
                                     Handle<JSObject> boilerplate,
                                     PretenureFlag pretenure,
                                     AllocationSiteUsageContext* site_context);
-  Node* AllocateMutableHeapNumber(double value, Node* effect, Node* control);
 
   // Infers the LiteralsArray to use for a given {node}.
   MaybeHandle<LiteralsArray> GetSpecializationLiterals(Node* node);