diff --git a/activesupport/lib/active_support/core_ext/symbol.rb b/activesupport/lib/active_support/core_ext/symbol.rb
index d41d47e70e6e1bef053709c4a1090f07ef49d819..e4ac4438099f75af8a82b6dc98b2bc2fa9a0b09d 100644
--- a/activesupport/lib/active_support/core_ext/symbol.rb
+++ b/activesupport/lib/active_support/core_ext/symbol.rb
@@ -1,10 +1,3 @@
-# Remove 1.8.7's incompatible method.
-if :to_proc.respond_to?(:to_proc) && [1] != ([[1, 2]].map(&:first) rescue false)
-  class Symbol
-    remove_method :to_proc
-  end
-end
-
 unless :to_proc.respond_to?(:to_proc)
   class Symbol
     # Turns the symbol into a simple proc, which is especially useful for enumerations. Examples: