remove git version check from check_version.rb

ci_scripts/check_version.rb

@@ -1,7 +1,6 @@
 #!/usr/bin/env ruby
 
 puts "Checking that version is set correctly..."
-git_version = `git describe`.strip.split("-").first # this is the most recent tag
 file_version = File.open('VERSION').first.strip
 search_result = `grep #{file_version} ./Stripe/PublicHeaders/STPAPIClient.h`
 
@@ -9,12 +8,4 @@ if search_result.length == 0
   abort("VERSION does not match STPSDKVersion in STPAPIClient.h")
 end
 
-if ENV["TRAVIS_BRANCH"] == "master"
-
-  if git_version > "v#{file_version}"
-    abort("Current git tag is greater than VERSION, did you forget to increment it?")
-  end
-
-end
-
 puts "Done!"