docs: Default value of table level distribution-mode should be not set (

#11663)

docs/docs/configuration.md

@@ -67,10 +67,10 @@ Iceberg tables support table properties to configure table behavior, like the de
 | write.metadata.metrics.column.col1                   | (not set)                   | Metrics mode for column 'col1' to allow per-column tuning; none, counts, truncate(length), or full                                                                                                |
 | write.target-file-size-bytes                         | 536870912 (512 MB)          | Controls the size of files generated to target about this many bytes                                                                                                                              |
 | write.delete.target-file-size-bytes                  | 67108864 (64 MB)            | Controls the size of delete files generated to target about this many bytes                                                                                                                       |
-| write.distribution-mode |  none, see engines for specific defaults, for example [Spark Writes](spark-writes.md#writing-distribution-modes) | Defines distribution of write data: __none__: don't shuffle rows; __hash__: hash distribute by partition key ; __range__: range distribute by partition key or sort key if table has an SortOrder |
-| write.delete.distribution-mode                       | hash                        | Defines distribution of write delete data                                                                                                                                                         |
-| write.update.distribution-mode                       | hash                        | Defines distribution of write update data                                                                                                                                                         |
-| write.merge.distribution-mode                        | none                        | Defines distribution of write merge data                                                                                                                                                          |
+| write.distribution-mode |  not set, see engines for specific defaults, for example [Spark Writes](spark-writes.md#writing-distribution-modes) | Defines distribution of write data: __none__: don't shuffle rows; __hash__: hash distribute by partition key ; __range__: range distribute by partition key or sort key if table has an SortOrder |
+| write.delete.distribution-mode                       | (not set)                   | Defines distribution of write delete data                                                                                                                                                         |
+| write.update.distribution-mode                       | (not set)                   | Defines distribution of write update data                                                                                                                                                         |
+| write.merge.distribution-mode                        | (not set)                   | Defines distribution of write merge data                                                                                                                                                          |
 | write.wap.enabled                                    | false                       | Enables write-audit-publish writes                                                                                                                                                                |
 | write.summary.partition-limit                        | 0                           | Includes partition-level summary stats in snapshot summaries if the changed partition count is less than this limit                                                                               |
 | write.metadata.delete-after-commit.enabled           | false                       | Controls whether to delete the oldest **tracked** version metadata files after commit                                                                                                             |