[C++][Parquet] Deprecate column scanner?
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Component: C++
Component: Parquet
Type: enhancement
- Dominant language
- C++
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Description
### Describe the enhancement requested
The `Scanner` and `TypedScanner` classes are used nowhere in the codebase except in `ParquetFilePrinter::DebugPrint`. They also have not received any significant maintenance since [5 years ago](https://github.com/apache/arrow/pull/4385).
Should we deprecate them? The printing functionality can be folded back in `ParquetFilePrinter` (or perhaps create a new `ParquetColumnPrinter`).
### Component(s)
C++, Parquet
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