(maint) Fix incorrectly resolved merge conflict

Due to a merge conflict that was not properly resolved, a method
which did not exist was being called in the server action, causing
the action to fail. Remove the unneeded method call so that the
server action will work as intended.

lib/puppet/face/strings.rb

@@ -86,7 +86,6 @@ Puppet::Face.define(:strings, '0.0.1') do
       # used as the module name and the path indicates which `.yardoc` index to
       # generate documentation from.
       yard_args = %w[-m -q] + module_tuples.flatten
-      merge_puppet_args!(yard_args)
 
       server_actions.serve_documentation(*yard_args)
     end