Cleanup removed file from gemspec

ruby-geonames.gemspec

@@ -7,7 +7,7 @@ Gem::Specification.new do |s|
   s.homepage = "http://github.com/elecnix/ruby-geonames"
   s.platform = Gem::Platform::RUBY
   s.summary = "Ruby library for Geonames Web Services (http://www.geonames.org/export/)"
-  s.files = ["README.markdown", "lib/timezone.rb", "lib/wikipedia_article.rb", "lib/geonames.rb", "lib/postal_code_search_criteria.rb", "lib/intersection.rb", "lib/country_subdivision.rb", "lib/toponym.rb", "lib/toponym_search_result.rb", "lib/bounding_box.rb", "lib/web_service.rb", "lib/postal_code.rb", "lib/toponym_search_criteria.rb", "lib/tc_country_info.rb", "lib/main.rb", "lib/Rakefile.rb", "lib/address.rb", "lib/country_info.rb"]
+  s.files = ["README.markdown", "lib/timezone.rb", "lib/wikipedia_article.rb", "lib/geonames.rb", "lib/postal_code_search_criteria.rb", "lib/intersection.rb", "lib/country_subdivision.rb", "lib/toponym.rb", "lib/toponym_search_result.rb", "lib/bounding_box.rb", "lib/web_service.rb", "lib/postal_code.rb", "lib/toponym_search_criteria.rb", "lib/tc_country_info.rb", "lib/main.rb", "lib/address.rb", "lib/country_info.rb"]
   s.require_path = "lib"
   s.has_rdoc = true
   s.extra_rdoc_files = ["README.markdown"]