Remove an unnecessary setting in reline.gemspec

reline.gemspec

@@ -14,15 +14,6 @@ Gem::Specification.new do |spec|
   spec.homepage      = 'https://github.com/aycabta/reline'
   spec.license       = 'Ruby License'
 
-  # Prevent pushing this gem to RubyGems.org. To allow pushes either set the 'allowed_push_host'
-  # to allow pushing to a single host or delete this section to allow pushing to any host.
-  if spec.respond_to?(:metadata)
-    spec.metadata['allowed_push_host'] = "TODO: Set to 'http://mygemserver.com'"
-  else
-    raise 'RubyGems 2.0 or newer is required to protect against ' \
-      'public gem pushes.'
-  end
-
   spec.files         = Dir['BSDL', 'COPYING', 'README.md', 'lib/**/*']
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }