Remove kNoSandbox now that services/service_manager/standalone is gone

services/service_manager/switches.cc

Index: services/service_manager/switches.cc
diff --git a/services/service_manager/switches.cc b/services/service_manager/switches.cc
index c8b9d2f821fd56e140a12435b37c69ecd0f900f5..2d33ae0b9cac954e7ff213d0c29f515dbc95d205 100644
--- a/services/service_manager/switches.cc
+++ b/services/service_manager/switches.cc
@@ -10,8 +10,5 @@ namespace switches {
 // Enable the tracing service.
 const char kEnableTracing[] = "enable-service-manager-tracing";
 
-// Disables the sandbox for debugging.
-const char kNoSandbox[] = "no-sandbox";
-
 }  // namespace switches
 }  // namespace service_manager