Remove deprecated config options (#18102)
Closes #18066
Summary of the issue:
Some deprecated config keys are still included in the config spec.
Description of user facing changes
None.
Description of developer facing changes
The config.conf["documentFormatting"]["reportFontAttributes"] definition has been removed from the config spec, and the code linking it and ["fontAttributeReporting"] has been removed.
Description of development approach
Removed the linking code and the line in the config spec.
