Move Style/BracesAroundHashParameters to rubocop blacklist.

[ashercodeorg]

Note that none of the configuration options seem to make sense with our prevailing style and/or our beliefs about how things should be.

The default no_braces option would require eliminating braces in many contexts where their presence vastly improves readability by grouping the final hash parameters. The braces option would require adding braces in many contexts where doing so provides no benefit. And the context_dependent is the worst of both worlds.