remove unused import

Author: roninopf

iterableapi/src/main/java/com/iterable/iterableapi/InboxSessionManager.java

@@ -10,8 +10,6 @@
 import java.util.Map;
 import java.util.Set;
 
-import com.iterable.iterableapi.IterableInboxSession.Impression;
-
 @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
 public class InboxSessionManager {
     private static final String TAG = "InboxSessionManager";