[Chapel Merge] Remove channel.readwrite

Branch: refs/heads/main
Revision: 5f7e4f1
Author: benharsh
Link: Remove channel.readwrite by benharsh · Pull Request #20352 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #20352 from benharsh/remove-channel-readwrite

Remove channel.readwrite

The channel.readwrite method was deprecated in #19940. This PR removes channel.readwrite entirely and updates relevant documentation and tests.

[reviewed-by @e-kayrakli]

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

R test/deprecated/IO/readwrite.good
M modules/standard/IO.chpl
M test/chpldoc/functions/operatorPrimaryMethods.doc.chpl
M test/chpldoc/functions/operatorSecondaryMethods.doc.chpl
M test/chpldoc/functions/operators.doc.chpl
M test/visibility/except/operatorsExceptions/DefinesOp.chpl

Compare: https://github.com/chapel-lang/chapel/compare/bf4dbfed4159...5f7e4f1d58ea