Remove kNoSandbox now that services/service_manager/standalone is gone

services/service_manager/switches.h

Index: services/service_manager/switches.h
diff --git a/services/service_manager/switches.h b/services/service_manager/switches.h
index fc12923eea54fd42272556ad6cb0f1fd8a89868c..68b5f1b88ae10908cc65641bcceaa3c1a73dd9cd 100644
--- a/services/service_manager/switches.h
+++ b/services/service_manager/switches.h
@@ -11,7 +11,6 @@ namespace switches {
 // All switches in alphabetical order. The switches should be documented
 // alongside the definition of their values in the .cc file.
 extern const char kEnableTracing[];
-extern const char kNoSandbox[];
 
 }  // namespace switches
 }  // namespace service_manager