[interpreter] Introduce fused bytecodes for common sequences.

src/interpreter/bytecodes.cc

Index: src/interpreter/bytecodes.cc
diff --git a/src/interpreter/bytecodes.cc b/src/interpreter/bytecodes.cc
index 4a818496d46ffcdbcc647a0edfe876d4eedbde6c..b0c90da3e8b7f085c3578b27bc43ecffe54f03a7 100644
--- a/src/interpreter/bytecodes.cc
+++ b/src/interpreter/bytecodes.cc
@@ -100,14 +100,6 @@ const char* Bytecodes::OperandSizeToString(OperandSize operand_size) {
   return "";
 }
 
-
-// static
-uint8_t Bytecodes::ToByte(Bytecode bytecode) {
-  DCHECK(bytecode <= Bytecode::kLast);
-  return static_cast<uint8_t>(bytecode);
-}
-
-
 // static
 Bytecode Bytecodes::FromByte(uint8_t value) {
   Bytecode bytecode = static_cast<Bytecode>(value);