diff --git a/support/internal/BUILD b/support/internal/BUILD
index f776dc0e1..d19f3497c 100644
--- a/support/internal/BUILD
+++ b/support/internal/BUILD
@@ -12,7 +12,6 @@ cc_library(
         "check_no_mutable_aliasing.h",
         "cxx20_backports.h",
         "fmt.h",
-        "lazy_init.h",
         "memswap.h",
         "offsetof.h",
         "sizeof.h",
diff --git a/support/internal/lazy_init.h b/support/internal/lazy_init.h
deleted file mode 100644
index fbd926558..000000000
--- a/support/internal/lazy_init.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// Part of the Crubit project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-#ifndef THIRD_PARTY_CRUBIT_SUPPORT_INTERNAL_LAZY_INIT_H_
-#define THIRD_PARTY_CRUBIT_SUPPORT_INTERNAL_LAZY_INIT_H_
-#include <memory>
-
-namespace crubit {
-
-template <typename T>
-union LazyInit {
-  constexpr LazyInit() {}
-  ~LazyInit() { std::destroy_at(&this->val); }
-  T val;
-};
-
-}  // namespace crubit
-
-#endif  // THIRD_PARTY_CRUBIT_SUPPORT_INTERNAL_LAZY_INIT_H_