diff --git a/extensions/ImGuiEXT/CCImGuiEXT.cpp b/extensions/ImGuiEXT/CCImGuiEXT.cpp
index 33bb8a6525..36bf686062 100644
--- a/extensions/ImGuiEXT/CCImGuiEXT.cpp
+++ b/extensions/ImGuiEXT/CCImGuiEXT.cpp
@@ -700,78 +700,4 @@ int ImGuiEXT::getCCRefId(Ref* p)
     return (int)hash;
 }
 
-#if defined(HAVE_IMGUI_MARKDOWN)
-#    include "imgui_markdown/imgui_markdown.h"
-
-static ImGuiEXT::MdLinkCallback ImGuiMarkdownLinkCallback     = nullptr;
-static ImGuiEXT::MdImageCallback ImGuiMarkdownImageCallback   = nullptr;
-static ImGui::MarkdownImageData ImGuiMarkdownInvalidImageData = {false, false, nullptr, {0.f, 0.f}};
-
-void MarkdownLinkCallback(ImGui::MarkdownLinkCallbackData data)
-{
-    if (ImGuiMarkdownLinkCallback)
-    {
-        ImGuiMarkdownLinkCallback({data.text, (size_t)data.textLength}, {data.link, (size_t)data.linkLength},
-                                  data.isImage);
-    }
-}
-
-ImGui::MarkdownImageData MarkdownImageCallback(ImGui::MarkdownLinkCallbackData data)
-{
-    if (!data.isImage || !ImGuiMarkdownImageCallback)
-        return ImGuiMarkdownInvalidImageData;
-    Sprite* sp;
-    ImVec2 size;
-    ImVec4 tint_col;
-    ImVec4 border_col;
-    std::tie(sp, size, tint_col, border_col) =
-        ImGuiMarkdownImageCallback({data.text, (size_t)data.textLength}, {data.link, (size_t)data.linkLength});
-    if (!sp || !sp->getTexture())
-        return ImGuiMarkdownInvalidImageData;
-    auto size_      = size;
-    const auto rect = sp->getTextureRect();
-    if (size_.x <= 0.f)
-        size_.x = rect.size.width;
-    if (size_.y <= 0.f)
-        size_.y = rect.size.height;
-    ImVec2 uv0, uv1;
-    std::tie(uv0, uv1) = getTextureUV(sp);
-    ImGuiEXT::getInstance()->getCCRefId(sp);
-    return {true, true, (ImTextureID)sp->getTexture(), size_, uv0, uv1, tint_col, border_col};
-}
-
-static std::string ImGuiMarkdownLinkIcon;
-static ImGui::MarkdownConfig ImGuiMarkdownConfig = {MarkdownLinkCallback, MarkdownImageCallback, ""};
-
-void ImGuiEXT::setMarkdownLinkCallback(const MdLinkCallback& f)
-{
-    ImGuiMarkdownLinkCallback = f;
-}
-
-void ImGuiEXT::setMarkdownImageCallback(const MdImageCallback& f)
-{
-    ImGuiMarkdownImageCallback = f;
-}
-
-void ImGuiEXT::setMarkdownFont(int index, ImFont* font, bool seperator, float scale)
-{
-    if (index < 0 || index >= ImGui::MarkdownConfig::NUMHEADINGS)
-        return;
-    ImGuiMarkdownConfig.headingFormats[index] = {font, seperator};
-    ImGuiMarkdownConfig.headingScales[index]  = scale;
-}
-
-void ImGuiEXT::setMarkdownLinkIcon(std::string_view icon)
-{
-    ImGuiMarkdownLinkIcon        = icon;
-    ImGuiMarkdownConfig.linkIcon = ImGuiMarkdownLinkIcon.c_str();
-}
-
-void ImGuiEXT::markdown(std::string_view content)
-{
-    ImGui::Markdown(content.c_str(), content.size(), ImGuiMarkdownConfig);
-}
-
-#endif
-
 NS_CC_EXT_END
diff --git a/extensions/ImGuiEXT/CCImGuiEXT.h b/extensions/ImGuiEXT/CCImGuiEXT.h
index c03cddc0c2..01508729c3 100644
--- a/extensions/ImGuiEXT/CCImGuiEXT.h
+++ b/extensions/ImGuiEXT/CCImGuiEXT.h
@@ -116,20 +116,6 @@ public:
     static void mergeFontGlyphs(ImFont* dst, ImFont* src, ImWchar start, ImWchar end);
     int getCCRefId(Ref* p);
 
-#if defined(HAVE_IMGUI_MARKDOWN)
-    // markdown
-
-    using MdLinkCallback = std::function<void(const std::string&, const std::string&, bool)>;
-    using MdImageCallback =
-        std::function<std::tuple<Sprite*, ImVec2, ImVec4, ImVec4>(const std::string&, const std::string&)>;
-
-    void setMarkdownLinkCallback(const MdLinkCallback& f);
-    void setMarkdownImageCallback(const MdImageCallback& f);
-    void setMarkdownFont(int index, ImFont* font, bool seperator, float scale = 1.f);
-    void setMarkdownLinkIcon(std::string_view icon);
-    void markdown(std::string_view content);
-#endif
-
 private:
     static void loadCustomFonts(void*);
 
diff --git a/extensions/assets-manager/AssetsManagerEx.cpp b/extensions/assets-manager/AssetsManagerEx.cpp
index 8636f4523e..22bf8ef3b4 100644
--- a/extensions/assets-manager/AssetsManagerEx.cpp
+++ b/extensions/assets-manager/AssetsManagerEx.cpp
@@ -803,7 +803,7 @@ void AssetsManagerEx::startUpdate()
                 Manifest::AssetDiff diff = it->second;
                 if (diff.type != Manifest::DiffType::DELETED)
                 {
-                    const std::string& path = diff.asset.path;
+                    auto& path = diff.asset.path;
                     DownloadUnit unit;
                     unit.customId = it->first;
                     unit.srcUrl   = packageUrl;