Fix checkstyle

Author: katcharov

driver-core/src/test/unit/com/mongodb/internal/async/AsyncFunctionsTest.java

@@ -15,8 +15,6 @@
  */
 package com.mongodb.internal.async;
 
-import com.mongodb.internal.TimeoutContext;
-import com.mongodb.internal.TimeoutSettings;
 import org.junit.jupiter.api.Test;
 
 import java.util.function.BiConsumer;