Removed context from read_template_file, fixed tests to match new arity

lib/liquid/tags/include.rb

@@ -81,15 +81,7 @@ module Liquid
       def read_template_from_file_system(context)
         file_system = context.registers[:file_system] || Liquid::Template.file_system
 
-        # make read_template_file call backwards-compatible.
-        case file_system.method(:read_template_file).arity
-        when 1
-          file_system.read_template_file(context.evaluate(@template_name))
-        when 2
-          file_system.read_template_file(context.evaluate(@template_name), context)
-        else
-          raise ArgumentError, "file_system.read_template_file expects two parameters: (template_name, context)"
-        end
+        file_system.read_template_file(context.evaluate(@template_name))
       end
 
       def pass_options

test/integration/blank_test.rb

@@ -9,7 +9,7 @@ class FoobarTag < Liquid::Tag
 end
 
 class BlankTestFileSystem
-  def read_template_file(template_path, context)
+  def read_template_file(template_path)
     template_path
   end
 end

test/integration/render_profiling_test.rb

@@ -4,7 +4,7 @@ class RenderProfilingTest < Minitest::Test
   include Liquid
 
   class ProfilingFileSystem
-    def read_template_file(template_path, context)
+    def read_template_file(template_path)
       "Rendering template {% assign template_name = '#{template_path}'%}\n{{ template_name }}"
     end
   end

test/integration/tags/include_tag_test.rb

@@ -1,7 +1,7 @@
 require 'test_helper'
 
 class TestFileSystem
-  def read_template_file(template_path, context)
+  def read_template_file(template_path)
     case template_path
     when "product"
       "Product: {{ product.title }} "
@@ -37,14 +37,14 @@ class TestFileSystem
 end
 
 class OtherFileSystem
-  def read_template_file(template_path, context)
+  def read_template_file(template_path)
     'from OtherFileSystem'
   end
 end
 
 class CountingFileSystem
   attr_reader :count
-  def read_template_file(template_path, context)
+  def read_template_file(template_path)
     @count ||= 0
     @count += 1
     'from CountingFileSystem'
@@ -132,7 +132,7 @@ class IncludeTagTest < Minitest::Test
   def test_recursively_included_template_does_not_produce_endless_loop
 
     infinite_file_system = Class.new do
-      def read_template_file(template_path, context)
+      def read_template_file(template_path)
         "-{% include 'loop' %}"
       end
     end
@@ -145,18 +145,6 @@ class IncludeTagTest < Minitest::Test
 
   end
 
-  def test_backwards_compatability_support_for_overridden_read_template_file
-    infinite_file_system = Class.new do
-      def read_template_file(template_path) # testing only one argument here.
-        "- hi mom"
-      end
-    end
-
-    Liquid::Template.file_system = infinite_file_system.new
-
-    Template.parse("{% include 'hi_mom' %}").render!
-  end
-
   def test_dynamically_choosen_template
     assert_template_result "Test123", "{% include template %}", "template" => 'Test123'
     assert_template_result "Test321", "{% include template %}", "template" => 'Test321'