shill: cellular: Delete CellularOperatorInfo.

|CellularOperatorInfo| has been replaced by |MobileOperatorInfo|. Unwire the few
remaining places, and delete the old object.

BUG=chromium:371639
TEST=(1) Run shill_unittest
     (2) Run network_3GSmokeTest on a few modems.

Change-Id: Ib840f10c034f9777a504c0fb04eb442cdcb0ffb0
Reviewed-on: https://chromium-review.googlesource.com/201101
Reviewed-by: Thieu Le <thieule@chromium.org>
Commit-Queue: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/cellular_capability_universal.cc b/cellular_capability_universal.cc
index 61484d3..7b80646 100644
--- a/cellular_capability_universal.cc
+++ b/cellular_capability_universal.cc
@@ -74,7 +74,7 @@
 
 const char kPhoneNumber[] = "*99#";
 
-// This identifier is specified in the cellular_operator_info file.
+// This identifier is specified in the additional_providers.prototxt file.
 const char kVzwIdentifier[] = "c83d6597-dc91-4d48-a3a7-d86b80123751";
 const size_t kVzwMdnLength = 10;