Remove unused functions in TrafficController

addInterface and hasUpdateDeviceStatsPermission are not used

Test: m & flush & boot
Bug: 217624062
Change-Id: I8a0f84f607a4f35512bc72e732df8f689b8ed1c9

service/native/include/TrafficController.h

@@ -45,11 +45,6 @@ class TrafficController {
      */
     netdutils::Status swapActiveStatsMap() EXCLUDES(mMutex);
 
-    /*
-     * Add the interface name and index pair into the eBPF map.
-     */
-    int addInterface(const char* name, uint32_t ifaceIndex);
-
     int changeUidOwnerRule(ChildChain chain, const uid_t uid, FirewallRule rule, FirewallType type);
 
     int removeUidOwnerRule(const uid_t uid);
@@ -185,8 +180,6 @@ class TrafficController {
     // need to call back to system server for permission check.
     std::set<uid_t> mPrivilegedUser GUARDED_BY(mMutex);
 
-    bool hasUpdateDeviceStatsPermission(uid_t uid) REQUIRES(mMutex);
-
     // For testing
     friend class TrafficControllerTest;
 };