removed duplicate rubocop exclusion

[ohaiwalt]

Description

Removes duplicate Style/FileName cop exclusion.

Issues Resolved

None.

Check List

• [x] All tests pass. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/TESTING.MD
• [x] New functionality includes testing.
• [x] New functionality has been documented in the README if applicable
• [x] The CLA has been signed. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/CONTRIBUTING.MD

Obvious fix.

[chef-supermarket]

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[tas50]

94 is going to nuke the file entirely so I'm closing this out