remove unused XPath.css conversion

lib/capybara/node/finders.rb

@@ -147,7 +147,7 @@ module Capybara
         elements = synchronize do
           # base.find(query.xpath(exact)).map do |node|
           if query.selector.preferred_format==:css
-            base.find(:css, query.locator)
+            base.find(:css, query.css)
           else
             base.find(:xpath, query.xpath(exact))
           end.map do |node|

lib/capybara/node/simple.rb

@@ -154,7 +154,11 @@ module Capybara
     private
 
       def resolve_query(query, exact=nil)
-        elements = native.xpath(query.xpath(exact)).map do |node|
+        elements = if query.selector.preferred_format == :css
+          native.css(query.css)
+        else
+          native.xpath(query.xpath(exact))
+        end.map do |node|
           self.class.new(node)
         end
         Capybara::Result.new(elements, query)

lib/capybara/query.rb

@@ -91,6 +91,10 @@ module Capybara
         @xpath.to_s
       end
     end
+    
+    def css
+      @xpath
+    end
 
   private
 

lib/capybara/selector.rb

@@ -35,9 +35,7 @@ module Capybara
     # Same as xpath, but wrap in XPath.css().
     def css(&block)
       @preferred_format = :css
-      if block
-        @xpath = xpath { |*args| XPath.css(block.call(*args)) }
-      end
+      @xpath = block if block
       @xpath
     end