Remove BackendUnifiedServiceManager::getImpl

It's not used and not needed.

Test: m
Bug: none
Change-Id: I530ba6cabfea3636abb008b7c783b5ea7383771f

Author: devinmoore-goog

libs/binder/BackendUnifiedServiceManager.cpp

@@ -172,10 +172,6 @@ BackendUnifiedServiceManager::BackendUnifiedServiceManager(const sp<AidlServiceM
     mCacheForGetService = std::make_shared<BinderCacheWithInvalidation>();
 }
 
-sp<AidlServiceManager> BackendUnifiedServiceManager::getImpl() {
-    return mTheRealServiceManager;
-}
-
 Status BackendUnifiedServiceManager::getService(const ::std::string& name,
                                                 sp<IBinder>* _aidl_return) {
     os::Service service;

libs/binder/BackendUnifiedServiceManager.h

@@ -121,7 +121,6 @@ class BackendUnifiedServiceManager : public android::os::BnServiceManager {
 public:
     explicit BackendUnifiedServiceManager(const sp<os::IServiceManager>& impl);
 
-    sp<os::IServiceManager> getImpl();
     binder::Status getService(const ::std::string& name, sp<IBinder>* _aidl_return) override;
     binder::Status getService2(const ::std::string& name, os::Service* out) override;
     binder::Status checkService(const ::std::string& name, os::Service* out) override;