diff --git a/shell/browser/api/electron_api_browser_window.cc b/shell/browser/api/electron_api_browser_window.cc
index 26ceb4f00140..2f96326874f2 100644
--- a/shell/browser/api/electron_api_browser_window.cc
+++ b/shell/browser/api/electron_api_browser_window.cc
@@ -513,7 +513,6 @@ v8::Local<v8::Value> BrowserWindow::From(v8::Isolate* isolate,
 
 namespace {
 
-using electron::api::BaseWindow;
 using electron::api::BrowserWindow;
 
 void Initialize(v8::Local<v8::Object> exports,
diff --git a/shell/browser/api/electron_api_cookies.cc b/shell/browser/api/electron_api_cookies.cc
index 8dfe136b1031..929e2344796c 100644
--- a/shell/browser/api/electron_api_cookies.cc
+++ b/shell/browser/api/electron_api_cookies.cc
@@ -26,8 +26,6 @@
 #include "shell/common/gin_helper/dictionary.h"
 #include "shell/common/gin_helper/object_template_builder.h"
 
-using content::BrowserThread;
-
 namespace gin {
 
 template <>
diff --git a/shell/browser/api/electron_api_menu_mac.mm b/shell/browser/api/electron_api_menu_mac.mm
index ab34ff799504..bc0860a7ecd5 100644
--- a/shell/browser/api/electron_api_menu_mac.mm
+++ b/shell/browser/api/electron_api_menu_mac.mm
@@ -18,8 +18,6 @@
 #include "shell/browser/unresponsive_suppressor.h"
 #include "shell/common/node_includes.h"
 
-using content::BrowserThread;
-
 namespace {
 
 static scoped_nsobject<NSMenu> applicationMenu_;
diff --git a/shell/browser/api/electron_api_session.cc b/shell/browser/api/electron_api_session.cc
index d9ce4f3c4949..97049b496c0f 100644
--- a/shell/browser/api/electron_api_session.cc
+++ b/shell/browser/api/electron_api_session.cc
@@ -1205,9 +1205,6 @@ const char* Session::GetTypeName() {
 
 namespace {
 
-using electron::api::Cookies;
-using electron::api::Protocol;
-using electron::api::ServiceWorkerContext;
 using electron::api::Session;
 
 v8::Local<v8::Value> FromPartition(const std::string& partition,
diff --git a/shell/browser/electron_browser_main_parts_posix.cc b/shell/browser/electron_browser_main_parts_posix.cc
index e570ec267b1c..a8a9cf8db195 100644
--- a/shell/browser/electron_browser_main_parts_posix.cc
+++ b/shell/browser/electron_browser_main_parts_posix.cc
@@ -19,8 +19,6 @@
 #include "content/public/browser/browser_thread.h"
 #include "shell/browser/browser.h"
 
-using content::BrowserThread;
-
 namespace electron {
 
 namespace {
diff --git a/shell/common/extensions/electron_extensions_api_provider.cc b/shell/common/extensions/electron_extensions_api_provider.cc
index 8a10e5054724..18309c03de00 100644
--- a/shell/common/extensions/electron_extensions_api_provider.cc
+++ b/shell/common/extensions/electron_extensions_api_provider.cc
@@ -27,9 +27,6 @@
 
 namespace extensions {
 
-namespace keys = manifest_keys;
-namespace errors = manifest_errors;
-
 constexpr APIPermissionInfo::InitInfo permissions_to_register[] = {
     {mojom::APIPermissionID::kDevtools, "devtools",
      APIPermissionInfo::kFlagImpliesFullURLAccess |
diff --git a/shell/renderer/extensions/electron_extensions_dispatcher_delegate.cc b/shell/renderer/extensions/electron_extensions_dispatcher_delegate.cc
index 3c1b8664d722..b385bb212e6d 100644
--- a/shell/renderer/extensions/electron_extensions_dispatcher_delegate.cc
+++ b/shell/renderer/extensions/electron_extensions_dispatcher_delegate.cc
@@ -16,8 +16,6 @@
 #include "extensions/renderer/native_extension_bindings_system.h"
 #include "extensions/renderer/native_handler.h"
 
-using extensions::NativeHandler;
-
 ElectronExtensionsDispatcherDelegate::ElectronExtensionsDispatcherDelegate() =
     default;