[Interpreter] Remove constant pool type in tests

test/cctest/interpreter/bytecode_expectations/ForIn.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
-pool type: mixed
 execute: yes
 wrap: yes
 
 ---
 snippet: "
   for (var p in null) {}
 "
 frame size: 2
 parameter count: 1
 bytecode array length: 3
@@ skipping 68 matching lines @@
                 B(Star), R(2),
   /*   73 S> */ B(Nop),
   /*   85 S> */ B(Return),
                 B(ForInStep), R(7),
                 B(Star), R(7),
                 B(Jump), U8(-23),
                 B(LdaUndefined),
   /*   85 S> */ B(Return),
 ]
 constant pool: [
-  InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
+  ONE_BYTE_INTERNALIZED_STRING_TYPE ["potatoes"],
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   var x = 0;
   for (var p in [1,2,3]) { x += p; }
 "
 frame size: 9
@@ skipping 21 matching lines @@
   /*   75 E> */ B(Add), R(0), U8(1),
                 B(Mov), R(0), R(8),
                 B(Star), R(0),
   /*   72 E> */ B(ForInStep), R(7),
                 B(Star), R(7),
                 B(Jump), U8(-31),
                 B(LdaUndefined),
   /*   80 S> */ B(Return),
 ]
 constant pool: [
-  InstanceType::FIXED_ARRAY_TYPE,
+  FIXED_ARRAY_TYPE,
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   var x = { 'a': 1, 'b': 2 };
   for (x['a'] in [10, 20, 30]) {
     if (x['a'] == 10) continue;
     if (x['a'] == 20) break;
@@ skipping 32 matching lines @@
   /*  136 E> */ B(TestEqual), R(7), U8(8),
                 B(JumpIfFalse), U8(4),
   /*  143 S> */ B(Jump), U8(8),
                 B(ForInStep), R(5),
                 B(Star), R(5),
                 B(Jump), U8(-53),
                 B(LdaUndefined),
   /*  152 S> */ B(Return),
 ]
 constant pool: [
-  InstanceType::FIXED_ARRAY_TYPE,
-  InstanceType::FIXED_ARRAY_TYPE,
-  InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
+  FIXED_ARRAY_TYPE,
+  FIXED_ARRAY_TYPE,
+  ONE_BYTE_INTERNALIZED_STRING_TYPE ["a"],
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   var x = [ 10, 11, 12 ] ;
   for (x[0] in [1,2,3]) { return x[3]; }
 "
 frame size: 9
@@ skipping 23 matching lines @@
   /*   83 S> */ B(LdaSmi), U8(3),
   /*   91 E> */ B(LdaKeyedProperty), R(0), U8(3),
   /*   98 S> */ B(Return),
                 B(ForInStep), R(5),
                 B(Star), R(5),
                 B(Jump), U8(-34),
                 B(LdaUndefined),
   /*   98 S> */ B(Return),
 ]
 constant pool: [
-  InstanceType::FIXED_ARRAY_TYPE,
-  InstanceType::FIXED_ARRAY_TYPE,
+  FIXED_ARRAY_TYPE,
+  FIXED_ARRAY_TYPE,
 ]
 handlers: [
 ]