remove a stop-gap config option

this is no longer needed

Author: jerrinot

integration-tests/debezium/src/test/java/kafka/DebeziumIT.java

@@ -63,8 +63,7 @@ public class DebeziumIT {
                     .dependsOn(kafkaContainer)
                     .withLogConsumer(new Slf4jLogConsumer(LoggerFactory.getLogger("debezium")))
                     .withEnv("CONNECT_KEY_CONVERTER_SCHEMAS_ENABLE", "true")
-                    .withEnv("CONNECT_VALUE_CONVERTER_SCHEMAS_ENABLE", "true")
-                    .withEnv("OFFSET_FLUSH_INTERVAL_MS", "1000");
+                    .withEnv("CONNECT_VALUE_CONVERTER_SCHEMAS_ENABLE", "true");
 
     @Container
     private final GenericContainer<?> questDBContainer = new GenericContainer<>("questdb/questdb:7.4.0")

integration-tests/exactlyonce/src/test/java/io/questdb/kafka/ExactlyOnceIT.java

@@ -171,7 +171,6 @@ private static GenericContainer<?> newConnectContainer(int id) {
         return new GenericContainer<>(CONNECT_CONTAINER_IMAGE)
                 .withEnv("CONNECT_BOOTSTRAP_SERVERS", "kafka0:9092")
                 .withEnv("CONNECT_GROUP_ID", "test")
-                .withEnv("CONNECT_OFFSET_FLUSH_INTERVAL_MS", "5000")
                 .withEnv("CONNECT_OFFSET_STORAGE_TOPIC", "connect-storage-topic")
                 .withEnv("CONNECT_CONFIG_STORAGE_TOPIC", "connect-config-topic")
                 .withEnv("CONNECT_STATUS_STORAGE_TOPIC", "connect-status-topic")