diff --git a/src/ast/array_decoration.cc b/src/ast/array_decoration.cc
deleted file mode 100644
index 9241f96dcb..0000000000
--- a/src/ast/array_decoration.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2020 The Tint Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "src/ast/array_decoration.h"
-
-TINT_INSTANTIATE_TYPEINFO(tint::ast::ArrayDecoration);
-
-namespace tint {
-namespace ast {
-
-constexpr const DecorationKind ArrayDecoration::Kind;
-
-ArrayDecoration::ArrayDecoration(const Source& source) : Base(source) {}
-
-ArrayDecoration::~ArrayDecoration() = default;
-
-DecorationKind ArrayDecoration::GetKind() const {
-  return Kind;
-}
-
-}  // namespace ast
-}  // namespace tint
diff --git a/src/ast/struct_member_decoration.cc b/src/ast/struct_member_decoration.cc
deleted file mode 100644
index 1e5b818fcc..0000000000
--- a/src/ast/struct_member_decoration.cc
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright 2020 The Tint Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "src/ast/struct_member_decoration.h"
-
-TINT_INSTANTIATE_TYPEINFO(tint::ast::StructMemberDecoration);
-
-namespace tint {
-namespace ast {
-
-constexpr const DecorationKind StructMemberDecoration::Kind;
-
-StructMemberDecoration::StructMemberDecoration(const Source& source)
-    : Base(source) {}
-
-StructMemberDecoration::~StructMemberDecoration() = default;
-
-DecorationKind StructMemberDecoration::GetKind() const {
-  return Kind;
-}
-
-}  // namespace ast
-}  // namespace tint
diff --git a/src/ast/type_decoration.cc b/src/ast/type_decoration.cc
deleted file mode 100644
index 8b7d45788a..0000000000
--- a/src/ast/type_decoration.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2020 The Tint Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "src/ast/type_decoration.h"
-
-TINT_INSTANTIATE_TYPEINFO(tint::ast::TypeDecoration);
-
-namespace tint {
-namespace ast {
-
-constexpr const DecorationKind TypeDecoration::Kind;
-
-TypeDecoration::TypeDecoration(const Source& source) : Base(source) {}
-
-TypeDecoration::~TypeDecoration() = default;
-
-DecorationKind TypeDecoration::GetKind() const {
-  return Kind;
-}
-
-}  // namespace ast
-}  // namespace tint
diff --git a/src/ast/variable_decoration.cc b/src/ast/variable_decoration.cc
deleted file mode 100644
index 93e57941d9..0000000000
--- a/src/ast/variable_decoration.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2020 The Tint Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "src/ast/variable_decoration.h"
-
-TINT_INSTANTIATE_TYPEINFO(tint::ast::VariableDecoration);
-
-namespace tint {
-namespace ast {
-
-constexpr const DecorationKind VariableDecoration::Kind;
-
-VariableDecoration::VariableDecoration(const Source& source) : Base(source) {}
-
-VariableDecoration::~VariableDecoration() = default;
-
-DecorationKind VariableDecoration::GetKind() const {
-  return Kind;
-}
-
-}  // namespace ast
-}  // namespace tint