[Interpreter] Remove constant pool type in tests

test/cctest/interpreter/bytecode_expectations/LetVariable.golden

Index: test/cctest/interpreter/bytecode_expectations/LetVariable.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/LetVariable.golden b/test/cctest/interpreter/bytecode_expectations/LetVariable.golden
index 4dbbdafd5ebd2629bee7aa0fe2cacc8c0117a8cd..b2f4d3840244376ee038134d8a8c14e7fb8def8c 100644
--- a/test/cctest/interpreter/bytecode_expectations/LetVariable.golden
+++ b/test/cctest/interpreter/bytecode_expectations/LetVariable.golden
@@ -3,7 +3,6 @@
 #
 
 ---
-pool type: string
 execute: yes
 wrap: yes
 
@@ -48,7 +47,7 @@ bytecodes: [
   /*   56 S> */ B(Return),
 ]
 constant pool: [
-  "x",
+  ONE_BYTE_INTERNALIZED_STRING_TYPE ["x"],
 ]
 handlers: [
 ]
@@ -76,7 +75,7 @@ bytecodes: [
   /*   52 S> */ B(Return),
 ]
 constant pool: [
-  "x",
+  ONE_BYTE_INTERNALIZED_STRING_TYPE ["x"],
 ]
 handlers: [
 ]
@@ -106,7 +105,7 @@ bytecodes: [
   /*   54 S> */ B(Return),
 ]
 constant pool: [
-  "x",
+  ONE_BYTE_INTERNALIZED_STRING_TYPE ["x"],
 ]
 handlers: [
 ]