remove useless 1.8 ruby code from Range#step, because Range#step with…

…out block always returns enumerator

activesupport/lib/active_support/core_ext/range/blockless_step.rb

@@ -1,27 +1,11 @@
 require 'active_support/core_ext/module/aliasing'
 
 class Range
-  begin
-    (1..2).step
-  # Range#step doesn't return an Enumerator
-  rescue LocalJumpError
-    # Return an array when step is called without a block.
-    def step_with_blockless(*args, &block)
-      if block_given?
-        step_without_blockless(*args, &block)
-      else
-        array = []
-        step_without_blockless(*args) { |step| array << step }
-        array
-      end
-    end
-  else
-    def step_with_blockless(*args, &block) #:nodoc:
-      if block_given?
-        step_without_blockless(*args, &block)
-      else
-        step_without_blockless(*args).to_a
-      end
+  def step_with_blockless(*args, &block) #:nodoc:
+    if block_given?
+      step_without_blockless(*args, &block)
+    else
+      step_without_blockless(*args).to_a
     end
   end