(CONT-811) Removing addition of rubygems_mfa requirement in gemspec - we already use GEM_HOST_API_KEY in our gem_release workflow

Author: GSPatton

puppet-lint.gemspec

@@ -33,5 +33,4 @@ Gem::Specification.new do |spec|
   spec.license = 'MIT'
 
   spec.required_ruby_version = Gem::Requirement.new('>= 2.7'.freeze)
-  spec.metadata['rubygems_mfa_required'] = 'true'
 end