VM: Remove dead code from flow graph optimizer.

runtime/vm/flow_graph_optimizer.h

Index: runtime/vm/flow_graph_optimizer.h
diff --git a/runtime/vm/flow_graph_optimizer.h b/runtime/vm/flow_graph_optimizer.h
index 9bbcbdffabff4bd35490efee99616367d5c21726..d9e5be47eaa764e22c120a3fc57e1bcaf6f7c5b5 100644
--- a/runtime/vm/flow_graph_optimizer.h
+++ b/runtime/vm/flow_graph_optimizer.h
@@ -54,12 +54,6 @@ class FlowGraphOptimizer : public FlowGraphVisitor {
 
   void WidenSmiToInt32();
 
-  void InferIntRanges();
-
-  void SelectIntegerInstructions();
-
-  void AnalyzeTryCatch();
-
   bool TryInlineRecognizedMethod(intptr_t receiver_cid,
                                  const Function& target,
                                  Instruction* call,
@@ -169,7 +163,6 @@ class FlowGraphOptimizer : public FlowGraphVisitor {
                                Definition* receiver,
                                intptr_t array_cid,
                                intptr_t view_cid,
-                               const ICData& ic_data,
                                TargetEntryInstr** entry,
                                Definition** last);
 
@@ -178,7 +171,6 @@ class FlowGraphOptimizer : public FlowGraphVisitor {
                                 Definition* receiver,
                                 intptr_t array_cid,
                                 intptr_t view_cid,
-                                const ICData& ic_data,
                                 TargetEntryInstr** entry,
                                 Definition** last);
 
@@ -256,7 +248,6 @@ class FlowGraphOptimizer : public FlowGraphVisitor {
   void TryMergeTruncDivMod(GrowableArray<BinarySmiOpInstr*>* merge_candidates);
   void TryMergeMathUnary(GrowableArray<MathUnaryInstr*>* merge_candidates);
 
-  void AppendLoadIndexedForMerged(Definition* instr, intptr_t ix, intptr_t cid);
   void AppendExtractNthOutputForMerged(Definition* instr, intptr_t ix,
                                        Representation rep, intptr_t cid);
   bool TryStringLengthOneEquality(InstanceCallInstr* call, Token::Kind op_kind);