Remove rubygems_mfa_required metadata

Remove MFA requirement from gemspec metadata.

Author: fern-support

square.gemspec

@@ -12,7 +12,6 @@ Gem::Specification.new do |spec|
   spec.summary = "Ruby client library for the Square API"
   spec.description = "The Square Ruby library provides convenient access to the Square API from Ruby."
   spec.required_ruby_version = ">= 3.3.0"
-  spec.metadata["rubygems_mfa_required"] = "true"
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.