Completely disable logging of warnings for unthumbnailable word docs, etc

[mbarnett]

Context

See #2046

After looking at this some more, and reading Rollbar's docs around error filtering more closely, it looks like #2046 isn't enough. We would keep sending this to Rollbar anyways, because a direct call like

jupiter/app/helpers/page_layout_helper.rb

Line 53 in f4297b1

Rollbar.warn("#{logo.record_type} with id: #{logo.record_id} and thumbnail #{logo.name} threw an error.", e)

will bypass the filters set in the Rollbar initializer.

What's New

Better to just disable this kind of logging entirely (also pulled it out of the logger since it's a waste of disk space to log every time someone sees a word doc or excel spreadsheet in a search result).

[ualbertalib-bot]

	1 Error
🚫	The following CHANGELOG entries are missing a link to a PR/issue: – Remove entirely unnecessary config file. – Turn off reporting things like "this excel spreadsheet isn't thumbnailable" as warnings to Rollbar – Completely disable logging of warnings around the "excel spreadsheet" issue

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[murny]

👍