fixup! Remove redundant explicit config metadata

For cops, our spec helper specifies that `config` metadata is always
added.

Author: pirj

spec/rubocop/cop/rspec/base_spec.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.describe RuboCop::Cop::RSpec::Base, :config do
+RSpec.describe RuboCop::Cop::RSpec::Base do
   let(:cop_class) { RuboCop::RSpec::FakeCop }
   let(:cop_config) { { 'Exclude' => %w[bar_spec.rb] } }
 

spec/rubocop/cop/rspec/instance_variable_spec.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.describe RuboCop::Cop::RSpec::InstanceVariable, :config do
+RSpec.describe RuboCop::Cop::RSpec::InstanceVariable do
   it 'flags an instance variable inside a describe' do
     expect_offense(<<-RUBY)
       describe MyClass do