cashew: SeviceManager: remove incorrect assert

src/service_manager.cc

Index: src/service_manager.cc
diff --git a/src/service_manager.cc b/src/service_manager.cc
index 2e8a9649646a6b6205df5efae631095918fd28a9..484f08c98525802d128f3fe7424eefe1f5a7e452 100644
--- a/src/service_manager.cc
+++ b/src/service_manager.cc
@@ -377,7 +377,6 @@ void ServiceManager::OnDefaultServiceUpdate(const DBus::Path *path) {
 void ServiceManager::ClearDefaultCellularService() {
   DLOG(INFO) << "ClearDefaultCellularService";
   if (default_cellular_service_ != NULL) {
-    DCHECK(GetService(default_cellular_service_->GetPath()) != NULL);
     DCHECK(default_cellular_service_->IsDefaultService());
     default_cellular_service_->OnDefaultServiceUpdate(false);
     default_cellular_service_ = NULL;