remove dead code for im event callback in android

src/controller/java/AndroidCallbacks.h

@@ -92,46 +92,6 @@ struct ReportCallback : public app::ClusterStateCache::Callback
     jclass mNodeStateCls  = nullptr;
 };
 
-struct ReportEventCallback : public app::ReadClient::Callback
-{
-    /** Subscription established callback can be nullptr. */
-    ReportEventCallback(jobject wrapperCallback, jobject subscriptionEstablishedCallback, jobject reportCallback,
-                        jobject resubscriptionAttemptCallback);
-    ~ReportEventCallback();
-
-    void OnReportBegin() override;
-
-    void OnReportEnd() override;
-
-    void OnEventData(const app::EventHeader & aEventHeader, TLV::TLVReader * apData, const app::StatusIB * apStatus) override;
-
-    void OnError(CHIP_ERROR aError) override;
-
-    void OnDone(app::ReadClient *) override;
-
-    void OnSubscriptionEstablished(SubscriptionId aSubscriptionId) override;
-
-    CHIP_ERROR OnResubscriptionNeeded(app::ReadClient * apReadClient, CHIP_ERROR aTerminationCause) override;
-
-    /** Report errors back to Java layer. attributePath may be nullptr for general errors. */
-    void ReportError(jobject eventPath, CHIP_ERROR err);
-    void ReportError(jobject eventPath, Protocols::InteractionModel::Status status);
-    void ReportError(jobject eventPath, const char * message, ChipError::StorageType errorCode);
-
-    CHIP_ERROR CreateChipEventPath(const app::ConcreteEventPath & aPath, jobject & outObj);
-
-    app::ReadClient * mReadClient = nullptr;
-
-    app::BufferedReadCallback mBufferedReadAdapter;
-    jobject mWrapperCallbackRef                 = nullptr;
-    jobject mSubscriptionEstablishedCallbackRef = nullptr;
-    jobject mResubscriptionAttemptCallbackRef   = nullptr;
-    jobject mReportCallbackRef                  = nullptr;
-    // NodeState Java object that will be returned to the application.
-    jobject mNodeStateObj = nullptr;
-    jclass mNodeStateCls  = nullptr;
-};
-
 struct WriteAttributesCallback : public app::WriteClient::Callback
 {
     WriteAttributesCallback(jobject wrapperCallback, jobject javaCallback);