From f728cb437377ae32c9c2b0b99ca9c55d6c8d9925 Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Date: Tue, 26 May 2026 18:50:20 -0400
Subject: [PATCH] [core] Remove deprecated seq/gens templates (#16685)

---
 esphome/core/automation.h | 21 ---------------------
 1 file changed, 21 deletions(-)

diff --git a/esphome/core/automation.h b/esphome/core/automation.h
index 468ea3b382..ea522a4d2d 100644
--- a/esphome/core/automation.h
+++ b/esphome/core/automation.h
@@ -13,27 +13,6 @@
 
 namespace esphome {
 
-// C++20 std::index_sequence is now used for tuple unpacking
-// Legacy seq<>/gens<> pattern deprecated but kept for backwards compatibility
-// https://stackoverflow.com/questions/7858817/unpacking-a-tuple-to-call-a-matching-function-pointer/7858971#7858971
-// Remove before 2026.6.0
-// NOLINTBEGIN(readability-identifier-naming)
-#if defined(__GNUC__) || defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-#endif
-
-template<int...> struct ESPDEPRECATED("Use std::index_sequence instead. Removed in 2026.6.0", "2025.12.0") seq {};
-template<int N, int... S>
-struct ESPDEPRECATED("Use std::make_index_sequence instead. Removed in 2026.6.0", "2025.12.0") gens
-    : gens<N - 1, N - 1, S...> {};
-template<int... S> struct gens<0, S...> { using type = seq<S...>; };
-
-#if defined(__GNUC__) || defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
-// NOLINTEND(readability-identifier-naming)
-
 /// Function-pointer-only templatable storage (4 bytes on 32-bit).
 /// Used by the TEMPLATABLE_VALUE macro for codegen-managed fields.
 /// Codegen wraps constants in stateless lambdas so only a function pointer is needed.