[TRTLLM-10184][chore] Remove legacy XQA precompiled path

cpp/tensorrt_llm/batch_manager/trtGptModel.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -184,18 +184,6 @@ class TrtGptModel : public executor::Model
             TLLM_LOG_INFO("TRTGptModel maxInputLen: %d = max_input_len (in trtllm-build args)", mMaxInputLen);
         }
 
-        // TODO: remove this when XQA JIT can be enabled for fp8 RNN models
-        if ((modelConfig.getQuantMode().hasFp8Qdq() || modelConfig.getQuantMode().hasFp8RowWise())
-            && modelConfig.isRnnBased())
-        {
-#if defined(_WIN32)
-            if (getenv("TRTLLM_ENABLE_XQA_JIT") == nullptr)
-                _putenv_s("TRTLLM_ENABLE_XQA_JIT", "0");
-#else
-            setenv("TRTLLM_ENABLE_XQA_JIT", "0", 0);
-#endif //_WIN32
-        }
-
         using tensorrt_llm::common::stl_utils::toString;
 
         TLLM_LOG_INFO("Capacity Scheduler Policy: %s",

cpp/tensorrt_llm/common/envUtils.cpp

@@ -151,21 +151,6 @@ bool forceXQAKernels()
     return forceXQA;
 }
 
-std::optional<bool> getEnvEnableXQAJIT()
-{
-    static std::optional<bool> val = []
-    {
-        std::optional<bool> val = std::nullopt;
-        auto const tmp = getIntEnv("TRTLLM_ENABLE_XQA_JIT");
-        if (tmp.has_value())
-        {
-            val = static_cast<bool>(tmp.value());
-        }
-        return val;
-    }();
-    return val;
-}
-
 std::optional<int> getEnvXqaBlocksPerSequence()
 {
     static auto const xqaBlocksPerSeq = []()

cpp/tensorrt_llm/common/envUtils.h

@@ -39,11 +39,6 @@ bool getBoolEnv(char const* name);
 // XQA kernels (optimized kernels for generation phase).
 bool forceXQAKernels();
 
-// Whether XQA JIT is enabled.
-//
-// Returns the value of TRTLLM_ENABLE_XQA_JIT env var. If such env var doesn't exist, std::nullopt is returned.
-std::optional<bool> getEnvEnableXQAJIT();
-
 // 0 means to use heuristics.
 std::optional<int32_t> getEnvXqaBlocksPerSequence();
 

cpp/tensorrt_llm/kernels/decoderMaskedMultiheadAttention/CMakeLists.txt

@@ -87,11 +87,3 @@ target_link_libraries(decoder_attention_src PUBLIC nvrtc_wrapper_src
 set_property(TARGET decoder_attention_src PROPERTY POSITION_INDEPENDENT_CODE ON)
 set_property(TARGET decoder_attention_src PROPERTY CUDA_RESOLVE_DEVICE_SYMBOLS
                                                    ON)
-
-# Embed cubins via INCBIN. Replaces the bin2c-style hex-array .cpp stubs that
-# previously lived under cubin/ and bloated the source tree by ~166 MB.
-include(tllm_cubin_archive)
-tllm_add_cubin_archive_sources(
-  decoder_attention_src "${CMAKE_CURRENT_SOURCE_DIR}/cubin"
-  ARCHS 80 86 89 90 120
-  IMPLICIT_FAMILY)