Use the unnamed namespace instead of an unofficial one.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40061 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/device_manager/legacy_drivers.cpp

@@ -42,7 +42,7 @@
 #define DRIVER_HASH_SIZE 16
 
 
-namespace LegacyDrivers {
+namespace {
 
 struct legacy_driver;
 
@@ -218,9 +218,7 @@ public:
 };
 
 
-}	// namespace LegacyDrivers
+}	// unnamed namespace
-
-using namespace LegacyDrivers;
 
 
 static status_t unload_driver(legacy_driver *driver);