Revert "Ensure original exception message is present in both Template::Error#message and Template::Error#inspect."

This reverts commit 403b06e98e.

The call to `message` calls `inspect` on our exception.  The exception
holds a reference to the environment, and the controller.  This string
becomes very large, and the call to `super` dups the string (in tern
doubling the memory used).  I'm reverting this for 3.1 but leaving the
commit on master.  We should stop holding references to so many objects
and reduce the size of our inspect.

actionpack/lib/action_view/template/error.rb

@@ -58,7 +58,6 @@ module ActionView
       attr_reader :original_exception, :backtrace
 
       def initialize(template, assigns, original_exception)
-        super(original_exception.message)
         @template, @assigns, @original_exception = template, assigns.dup, original_exception
         @sub_templates = nil
         @backtrace = original_exception.backtrace
@@ -68,6 +67,10 @@ module ActionView
         @template.identifier
       end
 
+      def message
+        original_exception.message
+      end
+
       def sub_template_message
         if @sub_templates
           "Trace of template inclusion: " +

actionpack/test/template/template_error_test.rb

@@ -1,13 +0,0 @@
-require "abstract_unit"
-
-class TemplateErrorTest < ActiveSupport::TestCase
-  def test_provides_original_message
-    error = ActionView::Template::Error.new("test", {}, Exception.new("original"))
-    assert_equal "original", error.message
-  end
-
-  def test_provides_useful_inspect
-    error = ActionView::Template::Error.new("test", {}, Exception.new("original"))
-    assert_equal "#<ActionView::Template::Error: original>", error.inspect
-  end
-end