Don't force host GL driver on nvidia platforms anymore

Using the host GL driver is already the default so need to special case
this for nvidia.

src/anbox/cmds/session_manager.cpp

@@ -133,13 +133,6 @@ anbox::cmds::SessionManager::SessionManager()
       return EXIT_FAILURE;
     }
 
-    // If we're running with the properietary nvidia driver we always
-    // use the host EGL driver as our translation doesn't work here.
-    if (fs::exists("/dev/nvidiactl")) {
-      INFO("Detected properietary nvidia driver; forcing use of the host EGL driver.");
-      gles_driver_ = graphics::GLRendererServer::Config::Driver::Host;
-    }
-
     utils::ensure_paths({
         SystemConfiguration::instance().socket_dir(),
         SystemConfiguration::instance().input_device_dir(),