remove proxy from the code in the tests

spec/spec_helper.rb

@@ -7,7 +7,7 @@ RSpec.configure do |conf|
   conf.before(:all) do
     Wedoops::MasmovilSmsclient.configure do |config|
       puts "Trying to config"
-      config.option = {proxy: "http://masmovil:0ckpsirlY2i9W5tzAk6j@prx.wedoops.io:443"}
+      config.option = {proxy: ENV["SMS_PROXY"]}
     end
   end