diff --git a/lib/irb/completion.rb b/lib/irb/completion.rb
index b3b2ecf924..76111393b6 100644
--- a/lib/irb/completion.rb
+++ b/lib/irb/completion.rb
@@ -356,14 +356,6 @@ module IRB
         else
           # func1.func2
           candidates = []
-          to_ignore = ignored_modules
-          ObjectSpace.each_object(Module){|m|
-            next if (to_ignore.include?(m) rescue true)
-            next unless m.respond_to?(:instance_methods) # JRuby has modules that represent java packages. They don't include many common ruby methods
-            candidates.concat m.instance_methods(false).collect{|x| x.to_s}
-          }
-          candidates.sort!
-          candidates.uniq!
         end
 
         if doc_namespace
diff --git a/test/irb/test_completion.rb b/test/irb/test_completion.rb
index c909b143a4..a16ee5b079 100644
--- a/test/irb/test_completion.rb
+++ b/test/irb/test_completion.rb
@@ -336,11 +336,9 @@ module TestIRB
       bind = obj.instance_exec { binding }
 
       assert_include(IRB::InputCompletor.retrieve_completion_data("public_hog", bind: bind), "public_hoge")
-      assert_include(IRB::InputCompletor.retrieve_completion_data("public_hoge.to_s", bind: bind), "public_hoge.to_s")
       assert_include(IRB::InputCompletor.retrieve_completion_data("public_hoge", bind: bind, doc_namespace: true), "public_hoge")
 
       assert_include(IRB::InputCompletor.retrieve_completion_data("private_hog", bind: bind), "private_hoge")
-      assert_include(IRB::InputCompletor.retrieve_completion_data("private_hoge.to_s", bind: bind), "private_hoge.to_s")
       assert_include(IRB::InputCompletor.retrieve_completion_data("private_hoge", bind: bind, doc_namespace: true), "private_hoge")
     end
   end