[turbofan] Avoid large deopt blocks

src/compiler/instruction.cc

Index: src/compiler/instruction.cc
diff --git a/src/compiler/instruction.cc b/src/compiler/instruction.cc
index 0df7ca0316ec3881783d07aaea0f48c7d2948688..39ea47689c963e1989c5ba7f92269e08c4c64c3c 100644
--- a/src/compiler/instruction.cc
+++ b/src/compiler/instruction.cc
@@ -589,9 +589,7 @@ InstructionBlock::InstructionBlock(Zone* zone, RpoNumber rpo_number,
       handler_(handler),
       needs_frame_(false),
       must_construct_frame_(false),
-      must_deconstruct_frame_(false),
-      last_deferred_(RpoNumber::Invalid()) {}
-
+      must_deconstruct_frame_(false) {}
 
 size_t InstructionBlock::PredecessorIndexOf(RpoNumber rpo_number) const {
   size_t j = 0;