Revert "Auto-load template handlers based on unmatched extensions [#1540 state:resolved]"

This reverts commit e8c1915416579a3840573ca2c80822d96cb31823.

Reasons :
- ActionPack tests run very slow
- Gem.searcher hanging for long time when extension is nil

1 files changed, 7 insertions, 3 deletions

diff --git a/actionpack/lib/action_view/template.rb b/actionpack/lib/action_view/template.rb
index 8f4ca433c0..93748638c3 100644
--- a/actionpack/lib/action_view/template.rb
+++ b/actionpack/lib/action_view/template.rb
@@ -98,6 +98,10 @@ module ActionView #:nodoc:
     end
 
     private
+      def valid_extension?(extension)
+        Template.template_handler_extensions.include?(extension)
+      end
+
       def find_full_path(path, load_paths)
         load_paths = Array(load_paths) + [nil]
         load_paths.each do |load_path|
@@ -111,11 +115,11 @@ module ActionView #:nodoc:
       #   [base_path, name, format, extension]
       def split(file)
         if m = file.match(/^(.*\/)?([^\.]+)\.?(\w+)?\.?(\w+)?\.?(\w+)?$/)
-          if Template.valid_extension?(m[5]) # Multipart formats
+          if valid_extension?(m[5]) # Multipart formats
             [m[1], m[2], "#{m[3]}.#{m[4]}", m[5]]
-          elsif Template.valid_extension?(m[4]) # Single format
+          elsif valid_extension?(m[4]) # Single format
             [m[1], m[2], m[3], m[4]]
-          elsif Template.valid_extension?(m[3]) # No format
+          elsif valid_extension?(m[3]) # No format
             [m[1], m[2], nil, m[3]]
           else # No extension
             [m[1], m[2], m[3], nil]