Revert "Add functions to allow update over cellular (including tethered connection)"

This reverts commit 4b0d6032cbb86ce488c03b31936cda31283f97e3.

Bug: 62366504
Test: GmsCore sees the old status code (i.e. UPDATED_NEED_REBOOT == 6).
Change-Id: I9185614a41bd621ad85e7f773b0f96919b0f70d5
diff --git a/omaha_request_action.h b/omaha_request_action.h
index 7d35c23..2915a6a 100644
--- a/omaha_request_action.h
+++ b/omaha_request_action.h
@@ -299,17 +299,11 @@
   void OnLookupPayloadViaP2PCompleted(const std::string& url);
 
   // Returns true if the current update should be ignored.
-  bool ShouldIgnoreUpdate(ErrorCode* error,
-                          const OmahaResponse& response) const;
-
-  // Return true if updates are allowed by user preferences.
-  bool IsUpdateAllowedOverCellularByPrefs(const OmahaResponse& response) const;
+  bool ShouldIgnoreUpdate(const OmahaResponse& response) const;
 
   // Returns true if updates are allowed over the current type of connection.
   // False otherwise.
-  bool IsUpdateAllowedOverCurrentConnection(
-      ErrorCode* error,
-      const OmahaResponse& response) const;
+  bool IsUpdateAllowedOverCurrentConnection() const;
 
   // Global system context.
   SystemState* system_state_;