chore(core): Remove deprecated method override

Author: PerfectSlayer

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

@@ -27,7 +27,6 @@ static AgentScope noopScope() {
   void close();
 
   interface Continuation extends TraceScope.Continuation {
-
     @Override
     Continuation hold();
 

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

@@ -15,19 +15,11 @@ public byte source() {
     return 0;
   }
 
-  @Override
-  public void setAsyncPropagation(final boolean value) {}
-
   @Override
   public Continuation capture() {
     return AgentTracer.NoopContinuation.INSTANCE;
   }
 
   @Override
   public void close() {}
-
-  @Override
-  public boolean isAsyncPropagating() {
-    return false;
-  }
 }