Remove gem avoidance hack · puppetlabs/puppet_litmus@6e5eb3c

Lint/SymbolConversion: Unnecessary symbol conversion; use `:"#{c}_exclude"` instead.

Lint/SymbolConversion: Unnecessary symbol conversion; use `:"#{c}_include"` instead.

Style/RedundantSelfAssignmentBranch: Remove the self-assignment branch.

Style/RedundantParentheses: Don't use parentheses around a logical expression.

Style/MapIntoArray: Use `map` instead of `each` to map elements into an array.

Style/RedundantFilterChain: Use `none?` instead of `select.empty?`.

Style/RedundantFilterChain: Use `none?` instead of `select.empty?`.

Layout/ExtraSpacing: Unnecessary spacing detected.

Process completed with exit code 1.

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