remove 1.8 openssl .rb parts since we now officially dropped support

Author: kares

lib/jopenssl/load.rb

@@ -34,10 +34,8 @@
   load 'jopenssl22/openssl.rb'
 elsif RUBY_VERSION > '2.1'
   load 'jopenssl21/openssl.rb'
-elsif RUBY_VERSION > '1.9'
-  load 'jopenssl19/openssl.rb'
 else
-  load 'jopenssl18/openssl.rb'
+  load 'jopenssl19/openssl.rb'
 end
 
 require 'openssl/pkcs12'