LuciferYang opened a new pull request #35665:
URL: https://github.com/apache/spark/pull/35665
### What changes were proposed in this pull request?
In Scala 2.12, `IterableLike.toIterator` identified as
`@deprecatedOverriding`:
```scala
@deprecatedOverriding("toIterator should stay consistent with iterator for
all Iterables: override iterator instead.", "2.11.0")
override def toIterator: Iterator[A] = iterator
```
In Scala 2.13, `IterableOnce.toIterator` identified as `@deprecated`:
```scala
@deprecated("Use .iterator instead of .toIterator", "2.13.0")
@`inline` final def toIterator: Iterator[A] = iterator
```
This PR replaces `toIterator` with `iterator` as recommended by scaladoc as
above.
### Why are the changes needed?
Cleanup deprecated api usage
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Pass GA
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