Do not use new struct type where unnecessary.

test/cctest/interpreter/bytecode_expectations/CallAndSpread.golden

Index: test/cctest/interpreter/bytecode_expectations/CallAndSpread.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/CallAndSpread.golden b/test/cctest/interpreter/bytecode_expectations/CallAndSpread.golden
index c2acbec1022148e0b0b7cf8b6084a21c8360b088..e639b771ae0c918cc92428a513d66fe26551b38a 100644
--- a/test/cctest/interpreter/bytecode_expectations/CallAndSpread.golden
+++ b/test/cctest/interpreter/bytecode_expectations/CallAndSpread.golden
@@ -27,7 +27,7 @@ bytecodes: [
 constant pool: [
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["Math"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["max"],
-  CONSTANT_ELEMENTS_PAIR_TYPE,
+  TUPLE2_TYPE,
 ]
 handlers: [
 ]
@@ -56,7 +56,7 @@ bytecodes: [
 constant pool: [
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["Math"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["max"],
-  CONSTANT_ELEMENTS_PAIR_TYPE,
+  TUPLE2_TYPE,
 ]
 handlers: [
 ]
@@ -98,9 +98,9 @@ bytecodes: [
 constant pool: [
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["Math"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["max"],
-  CONSTANT_ELEMENTS_PAIR_TYPE,
-  CONSTANT_ELEMENTS_PAIR_TYPE,
-  CONSTANT_ELEMENTS_PAIR_TYPE,
+  TUPLE2_TYPE,
+  TUPLE2_TYPE,
+  TUPLE2_TYPE,
 ]
 handlers: [
 ]