Remove capistrano version lock in deploy.rb

Author: Minh-Thien Nhan

guides/static/configuration.md

@@ -14,9 +14,6 @@ If you have followed the instructions on the [Setup](/guides/setup/local_machine
 The **deploy.rb** is our global configuration. Everything inside can be overriden by stage-specific settings and tasks, i.e. **deploy/dev.rb**. Every variable we're using can be read by **fetch(:variable_name)** within our configuration.
 
 {% highlight ruby %}
-# config valid only for current version of Capistrano
-lock '3.5.0'
-
 # the name of the application
 set :application, 'my-first-website'