### What changes were proposed in this pull request?
This PR removes sbt-avro plugin dependency.
In the current master, Build with SBT depends on the plugin but it seems never used.
Originally, the plugin was introduced for `flume-sink` in SPARK-1729 (#807) but `flume-sink` is no longer in Spark repository.
After SBT was upgraded to 1.x in SPARK-21708 (#29286), `avroGenerate` part was introduced in `object SQL` in `SparkBuild.scala`.
It's confusable but I understand `Test / avroGenerate := (Compile / avroGenerate).value` is for suppressing sbt-avro for `sql` sub-module.
In fact, Test/compile will fail if `Test / avroGenerate :=(Compile / avroGenerate).value` is commented out.
`sql` sub-module contains `parquet-compat.avpr` and `parquet-compat.avdl` but according to `sql/core/src/test/README.md`, they are intended to be handled by `gen-avro.sh`.
Also, in terms of Maven build, there seems to be no definition to handle `*.avpr` or `*.avdl`.
Based on the above, I think we can remove `sbt-avro`.
### Why are the changes needed?
If `sbt-avro` is really no longer used, it's confusable that `sbt-avro` related configurations are in `SparkBuild.scala`.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
GA.
Closes#33190 from sarutak/remove-avro-from-sbt.
Authored-by: Kousuke Saruta <sarutak@oss.nttdata.com>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
(cherry picked from commit 6c4616b2ac)
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
9b0971c40e