Remove unnecessary RSpec configuration
Remove unnecessary RSpec configuration

According to
https://www.rubydoc.info/gems/rspec-core/RSpec/Core/Configuration#disable_monkey_patching!-instance_method
these configurations are already set by `config.disable_monkey_patching!`

backus/rubocop-rspec,backus/rubocop-rspec,nevir/rubocop-rspec,bquorning/rubocop-rspec