(maint) Remove redundant version declaration

Use the variable to ensure tests for same version use the same source.

spec/classes/puppet_agent_windows_install_spec.rb

@@ -38,7 +38,7 @@
           end
 
           Puppet::Parser::Functions.newfunction(:pe_compiling_server_aio_build, :type => :rvalue) do |args|
-            '1.2.1.1'
+            package_version
           end
         end