Delete from sx_types.ml:
- Comment of string variant (no longer needed)
Delete from sx_parser.ml:
- _preserve_comments mutable ref
- collect_comment_node function
- comment-mode branches in read_value, read_list
- ~comments parameter from parse_all and parse_file
- skip_whitespace and read_comment (only used by old comment mode)
Delete from mcp_tree.ml:
- has_interior_comments function
- Comment handling in pretty_print_value
- pretty_print_file function (replaced by CST write-back)
- ~comments parameter from local parse_file
Migrate sx_pretty_print, sx_write_file, sx_doc_gen to CST path.
Net: -69 lines. 24/24 CST round-trips, 2583/2583 evaluator tests.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
giles
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