The CBF/TIFF writer removal left two docs describing them as available
output: JFJOCH_WRITER.md's "Other formats" section and an aside in
HDF5.md. A user following them would issue a now-rejected request. State
that only NXmx HDF5 is written and that the CBF/TIFF enum values are
retained for wire back-compatibility but rejected.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>