process: remove protection for SyncWriteStream destroy in stdio
https://github.com/nodejs/node/pull/26691 introduced an if to protect against SyncWriteStream not using the default .destroy() mechanism. This change removes that as SyncWriteStream now use standard .destroy().
See: https://github.com/nodejs/node/pull/26691
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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