shill: cellular: Remove "Cellular.ActivateOverNonCellularNetwork" property

BUG=chromium:384185
TEST=Unit tests, activate SIM on Verizon LTE

Change-Id: Ic1ca70328b13d07b75e64bf722472b11d4e883c3
Reviewed-on: https://chromium-review.googlesource.com/212370
Reviewed-by: Ben Chan <benchan@chromium.org>
Tested-by: Thieu Le <thieule@chromium.org>
Commit-Queue: Thieu Le <thieule@chromium.org>
diff --git a/cellular_capability_universal_cdma.cc b/cellular_capability_universal_cdma.cc
index 2dcf996..db67e0e 100644
--- a/cellular_capability_universal_cdma.cc
+++ b/cellular_capability_universal_cdma.cc
@@ -192,12 +192,10 @@
 }
 
 void CellularCapabilityUniversalCDMA::UpdateServiceActivationStateProperty() {
-  bool activation_required = IsServiceActivationRequired();
-  cellular()->service()->SetActivateOverNonCellularNetwork(activation_required);
   string activation_state;
   if (IsActivating())
       activation_state = kActivationStateActivating;
-  else if (activation_required)
+  else if (IsServiceActivationRequired())
       activation_state = kActivationStateNotActivated;
   else
       activation_state = kActivationStateActivated;