diff --git a/pkg/kernel/lib/binary/tag.dart b/pkg/kernel/lib/binary/tag.dart
index 3fcad114ab0..5d0e9035dbd 100644
--- a/pkg/kernel/lib/binary/tag.dart
+++ b/pkg/kernel/lib/binary/tag.dart
@@ -117,16 +117,8 @@ class Tag {
   static const int SimpleInterfaceType = 96;
   static const int SimpleFunctionType = 97;
 
-  // References
-  static const int NullReference = 99;
-  static const int ClassReference = 100;
-  static const int MemberReference = 101;
-
   static const int ConstantExpression = 106;
 
-  // Tag is deprecated since version 24.
-  static const int Deprecated_ConstantExpression = 107;
-
   /// 108 is occupied by [RedirectingFactoryConstructor] (member).
   /// 109 is occupied by [SetLiteral] (expression).
   /// 110 is occupied by [ConstSetLiteral] (expression).
diff --git a/runtime/vm/kernel_binary.h b/runtime/vm/kernel_binary.h
index bad22582b47..5cc232377ef 100644
--- a/runtime/vm/kernel_binary.h
+++ b/runtime/vm/kernel_binary.h
@@ -123,9 +123,6 @@ static const uint32_t kMaxSupportedKernelFormatVersion = 29;
   V(TypeParameterType, 95)                                                     \
   V(SimpleInterfaceType, 96)                                                   \
   V(SimpleFunctionType, 97)                                                    \
-  V(NullReference, 99)                                                         \
-  V(ClassReference, 100)                                                       \
-  V(MemberReference, 101)                                                      \
   V(ConstantExpression, 106)                                                   \
   V(Deprecated_ConstantExpression, 107)                                        \
   V(SpecializedVariableGet, 128)                                               \