[SPARK-39777][DOCS] Remove Hive bucketing incompatiblity documentation

### What changes were proposed in this pull request?

We support Hive bucketing (with Hive hash function - https://issues.apache.org/jira/browse/SPARK-32709 and https://issues.apache.org/jira/browse/SPARK-32712) started from Spark 3.3.0, we should also update the documentation to reflect the fact, that we are no longer incompatible with Hive bucketing.

### Why are the changes needed?

Update user-facing documentation to avoid confusion.

### Does this PR introduce _any_ user-facing change?

Yes, the doc itself.

### How was this patch tested?

Manually checked the doc file locally.

Closes #37189 from c21/doc.

Authored-by: Cheng Su <[email protected]>
Signed-off-by: Hyukjin Kwon <[email protected]>

Author: c21

docs/sql-migration-guide.md

@@ -1103,12 +1103,6 @@ Spark SQL supports the vast majority of Hive features, such as:
 Below is a list of Hive features that we don't support yet. Most of these features are rarely used
 in Hive deployments.
 
-**Major Hive Features**
-
-* Tables with buckets: bucket is the hash partitioning within a Hive table partition. Spark SQL
-  doesn't support buckets yet.
-
-
 **Esoteric Hive Features**
 
 * `UNION` type