Remove addShutdownListener from OT tracer

Author: nikita-tkachenko-datadog

dd-trace-api/src/main/java/datadog/trace/api/internal/InternalTracer.java

@@ -30,6 +30,4 @@ public interface InternalTracer {
    * @return DataStreamsCheckpointer instance.
    */
   DataStreamsCheckpointer getDataStreamsCheckpointer();
-
-  void addShutdownListener(Runnable listener);
 }

dd-trace-ot/src/main/java/datadog/opentracing/DDTracer.java

@@ -461,11 +461,6 @@ public DataStreamsCheckpointer getDataStreamsCheckpointer() {
     return tracer.getDataStreamsCheckpointer();
   }
 
-  @Override
-  public void addShutdownListener(Runnable listener) {
-    tracer.addShutdownListener(listener);
-  }
-
   @Override
   public ScopeManager scopeManager() {
     return scopeManager;

internal-api/src/main/java/datadog/trace/bootstrap/instrumentation/api/AgentTracer.java

@@ -412,6 +412,8 @@ default SpanBuilder buildSpan(CharSequence spanName) {
      * @param serviceName The service name to use as default.
      */
     void updatePreferredServiceName(String serviceName);
+
+    void addShutdownListener(Runnable listener);
   }
 
   public interface SpanBuilder {