fixes import issue

Author: otaviojava

streams/tck/src/main/java/org/eclipse/microprofile/reactive/streams/tck/FlatMapPublisherStageVerification.java

@@ -32,7 +32,6 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionStage;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import static org.testng.Assert.assertEquals;

streams/tck/src/main/java/org/eclipse/microprofile/reactive/streams/tck/FlatMapStageVerification.java

@@ -31,7 +31,6 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionStage;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Function;
 

streams/tck/src/main/java/org/eclipse/microprofile/reactive/streams/tck/ScheduledPublisher.java

@@ -28,7 +28,6 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
-import java.util.function.Consumer;
 import java.util.function.Supplier;
 
 import static org.testng.Assert.assertEquals;