Fix deprecation warning

Author: pathawks

spec/spec_helper.rb

@@ -8,7 +8,6 @@
 STDERR.reopen(test(?e, '/dev/null') ? '/dev/null' : 'NUL:')
 
 RSpec.configure do |config|
-  config.treat_symbols_as_metadata_keys_with_true_values = true
   config.run_all_when_everything_filtered = true
   config.filter_run :focus
   config.order = 'random'