[Chapel Merge] Remove ItemReader and ItemWriter

Branch: refs/heads/main
Revision: 1c7491c
Author: benharsh
Link: Remove ItemReader and ItemWriter by benharsh · Pull Request #20351 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #20351 from benharsh/remove-ItemReaderWriter

Remove ItemReader and ItemWriter

ItemReader, ItemWriter, and their relevant methods on the channel type were both deprecated in #19896. This PR removes these deprecated types and methods.

[reviewed-by @lydia-duncan]

Modified Files:
R test/deprecated/IO/itemReader.chpl

R test/deprecated/IO/itemReader.good
R test/deprecated/IO/itemWriter.chpl
R test/deprecated/IO/itemWriter.good
M modules/standard/IO.chpl
M test/deprecated/IO/readline.chpl
M test/deprecated/IO/readline.good
M test/io/ferguson/io_test.chpl
M test/io/ferguson/io_test.good

Compare: https://github.com/chapel-lang/chapel/compare/cc04fc1e9c09...1c7491ceacfb