Reverts 18c033dc5c

The merge that is reverted assigned categories to posts
based on the subfolders in the _posts directory and 
was merged under the understanding that it was fixing a bug.

Subfolders in the _posts directory should not assign 
metadata information to posts at this point in time and 
was not a bug.

lib/jekyll/post.rb

@@ -159,8 +159,6 @@ module Jekyll
     # Returns nothing.
     def process(name)
       m, cats, date, slug, ext = *name.match(MATCHER)
-      self.categories ||= []
-      self.categories += (cats || '').downcase.split('/')
       self.date = Utils.parse_date(date, "Post '#{relative_path}' does not have a valid date in the filename.")
       self.slug = slug
       self.ext = ext

test/test_post.rb

@@ -76,21 +76,6 @@ class TestPost < Test::Unit::TestCase
         assert_equal "/2008/09/09/foo-bar", @post.id
       end
 
-      should "keep categories" do
-        post = Post.allocate
-        post.site = @site
-        post.process("cat1/2008-09-09-foo-bar.textile")
-        assert_equal 1, post.categories.size
-        assert_equal "cat1", post.categories[0]
-
-        post = Post.allocate
-        post.site = @site
-        post.process("cat2/CAT3/2008-09-09-foo-bar.textile")
-        assert_equal 2, post.categories.size
-        assert_equal "cat2", post.categories[0]
-        assert_equal "cat3", post.categories[1]
-      end
-
       should "create url based on date and title" do
         @post.categories = []
         @post.process(@fake_file)
@@ -630,7 +615,7 @@ class TestPost < Test::Unit::TestCase
 
     should "generate categories and topics" do
       post = Post.new(@site, File.join(File.dirname(__FILE__), *%w[source]), 'foo', 'bar/2008-12-12-topical-post.textile')
-      assert_equal ['foo', 'bar'], post.categories
+      assert_equal ['foo'], post.categories
     end
   end
 

test/test_site.rb

@@ -212,7 +212,7 @@ class TestSite < Test::Unit::TestCase
 
       posts = Dir[source_dir("**", "_posts", "**", "*")]
       posts.delete_if { |post| File.directory?(post) && !Post.valid?(post) }
-      categories = %w(2013 bar baz category es foo z_category publish_test win).sort
+      categories = %w(2013 bar baz category foo z_category publish_test win).sort
 
       assert_equal posts.size - @num_invalid_posts, @site.posts.size
       assert_equal categories, @site.categories.keys.sort

test/test_tags.rb

@@ -275,8 +275,8 @@ CONTENT
     end
 
     should "have the url to the \"nested\" post from 2008-11-21" do
-      assert_match %r{3\s/es/2008/11/21/nested/}, @result
-      assert_match %r{4\s/es/2008/11/21/nested/}, @result
+      assert_match %r{3\s/2008/11/21/nested/}, @result
+      assert_match %r{4\s/2008/11/21/nested/}, @result
     end
   end