docs: Remove NiFi 1 section on Iceberg table page

Author: Techassi

docs/modules/nifi/assets/images/put-iceberg-processor.png

@@ -33,91 +33,3 @@ Please read on https://github.com/stackabletech/nifi-iceberg-bundle[its document
 You don't need any special configs on the `NiFiCluster` in case you are using S3 and no Kerberos.
 
 HDFS and Kerberos are also supported, please have a look at the https://github.com/stackabletech/nifi-operator/tree/main/tests/templates/kuttl/iceberg[Iceberg integration test] for that.
-
-== NiFi 1
-
-Starting with `1.19.0`, NiFi supports writing to Iceberg tables.
-
-The following example shows an example NiFi setup using the Iceberg integration.
-
-[source,yaml]
-----
-apiVersion: nifi.stackable.tech/v1alpha1
-kind: NifiCluster
-metadata:
-  name: nifi
-spec:
-  clusterConfig:
-    # ...
-    extraVolumes:
-      # Will be mounted at /stackable/userdata/nifi-hive-s3-config/
-      - name: nifi-hive-s3-config
-        secret:
-          secretName: nifi-hive-s3-config
----
-apiVersion: v1
-kind: Secret
-metadata:
-  name: nifi-hive-s3-config
-stringData:
-  core-site.xml: |
-    <configuration>
-      <property>
-        <name>fs.s3a.aws.credentials.provider</name>
-        <value>org.apache.hadoop.fs.s3a.SimpleAWSCredentialsProvider</value>
-      </property>
-
-      <property>
-        <name>fs.s3a.endpoint</name>
-        <value>http://minio:9000</value>
-      </property>
-
-      <property>
-        <name>fs.s3a.access.key</name>
-        <value>xxx</value>
-      </property>
-
-      <property>
-        <name>fs.s3a.secret.key</name>
-        <value>xxx</value>
-      </property>
-
-      <property>
-        <name>fs.s3a.path.style.access</name>
-        <value>true</value>
-      </property>
-
-      <property>
-        <name>fs.s3a.connection.ssl.enabled</name>
-        <value>false</value>
-        <description>Enables or disables SSL connections to S3.</description>
-      </property>
-    </configuration>
-----
-
-Please fill in the correct endpoint, access key and secret key for your S3 store, this is a classic Hadoop config file.
-
-Use e.g. Trino to create a table for Nifi to write into using something like
-
-[source,sql]
-----
-CREATE SCHEMA IF NOT EXISTS lakehouse.demo WITH (location = 's3a://lakehouse/demo/');
-
-CREATE TABLE IF NOT EXISTS lakehouse.demo.test (
-    test varchar
-);
-----
-
-In NiFi you need to create a `HiveCatalogService` first which allows you to access the Hive Metastore storing the Iceberg metadata.
-Set `Hive Metastore URI` to something like `thrift://hive-iceberg.default.svc.cluster.local:9083`,
-`Default Warehouse Location` to `s3a://lakehouse`
-and `Hadoop Configuration Resources` to `/stackable/userdata/nifi-hive-s3-config/core-site.xml`.
-
-Afterwards you can create the `PutIceberg` processor and configure the `HiveCatalogService`.
-Also set `Catalog Namespace` to your schema name and the `Table Name`.
-
-For the `File Format` it is recommended to use `PARQUET` or `ORC` rather than `AVRO` for performance reasons, but you can leave it empty or choose your desired format.
-
-You should end up with the following `PutIceberg` processor:
-
-image::put-iceberg-processor.png[]