I do not want to convert documents or PDF files. How can I disable it completely? [So in the original]
Well, you are not currently indexing them, so nothing will change.
The above message is an INFO message, this is not an error. If you do not want to see them in your event log, you can change the level of the event log in your assembly configuration or zope.conf
from documents:
event-log-level Set the level of the console output for the event log. Level may be any of CRITICAL, ERROR, WARN, INFO, DEBUG, or ALL. Defaults to INFO.
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