diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index 30470d2ebe758..51e127ab60f2f 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -148,15 +148,6 @@ pub fn syntax_expander_table() -> SyntaxEnv {
     syntax_expanders.insert(@~"deriving",
                             @SE(ItemDecorator(
                                 ext::deriving::expand_meta_deriving)));
-    syntax_expanders.insert(@~"deriving_eq",
-                            @SE(ItemDecorator(
-                                ext::deriving::eq::expand_deriving_obsolete)));
-    syntax_expanders.insert(@~"deriving_iter_bytes",
-                            @SE(ItemDecorator(
-                                ext::deriving::iter_bytes::expand_deriving_obsolete)));
-    syntax_expanders.insert(@~"deriving_clone",
-                            @SE(ItemDecorator(
-                                ext::deriving::clone::expand_deriving_obsolete)));
 
     // Quasi-quoting expanders
     syntax_expanders.insert(@~"quote_tokens",
diff --git a/src/libsyntax/ext/deriving/clone.rs b/src/libsyntax/ext/deriving/clone.rs
index 1a45107c26738..e2d6685ec6553 100644
--- a/src/libsyntax/ext/deriving/clone.rs
+++ b/src/libsyntax/ext/deriving/clone.rs
@@ -42,15 +42,6 @@ pub fn expand_deriving_clone(cx: @ext_ctxt,
                             &trait_def)
 }
 
-pub fn expand_deriving_obsolete(cx: @ext_ctxt,
-                                span: span,
-                                _mitem: @meta_item,
-                                in_items: ~[@item])
-                             -> ~[@item] {
-    cx.span_err(span, ~"`#[deriving_clone]` is obsolete; use `#[deriving(Clone)]` instead");
-    in_items
-}
-
 fn cs_clone(cx: @ext_ctxt, span: span,
             substr: &Substructure) -> @expr {
     let clone_ident = substr.method_ident;
diff --git a/src/libsyntax/ext/deriving/cmp/eq.rs b/src/libsyntax/ext/deriving/cmp/eq.rs
index 7fc2fdc796358..3d93f844ea3bb 100644
--- a/src/libsyntax/ext/deriving/cmp/eq.rs
+++ b/src/libsyntax/ext/deriving/cmp/eq.rs
@@ -56,11 +56,3 @@ pub fn expand_deriving_eq(cx: @ext_ctxt,
     expand_deriving_generic(cx, span, mitem, in_items,
                             &trait_def)
 }
-
-pub fn expand_deriving_obsolete(cx: @ext_ctxt,
-                                span: span,
-                                _mitem: @meta_item,
-                                in_items: ~[@item]) -> ~[@item] {
-    cx.span_err(span, ~"`#[deriving_eq]` is obsolete; use `#[deriving(Eq)]` instead");
-    in_items
-}
diff --git a/src/libsyntax/ext/deriving/iter_bytes.rs b/src/libsyntax/ext/deriving/iter_bytes.rs
index 27e3a54add540..1c9ec6ece2e1d 100644
--- a/src/libsyntax/ext/deriving/iter_bytes.rs
+++ b/src/libsyntax/ext/deriving/iter_bytes.rs
@@ -41,16 +41,6 @@ pub fn expand_deriving_iter_bytes(cx: @ext_ctxt,
     expand_deriving_generic(cx, span, mitem, in_items, &trait_def)
 }
 
-pub fn expand_deriving_obsolete(cx: @ext_ctxt,
-                                span: span,
-                                _mitem: @meta_item,
-                                in_items: ~[@item])
-                             -> ~[@item] {
-    cx.span_err(span, ~"`#[deriving_iter_bytes]` is obsolete; use `#[deriving(IterBytes)]` \
-                        instead");
-    in_items
-}
-
 fn iter_bytes_substructure(cx: @ext_ctxt, span: span, substr: &Substructure) -> @expr {
     let lsb0_f = match substr.nonself_args {
         [l, f] => ~[l, f],
diff --git a/src/test/compile-fail/deriving-obsolete.rs b/src/test/compile-fail/deriving-obsolete.rs
deleted file mode 100644
index 298dced1e21ed..0000000000000
--- a/src/test/compile-fail/deriving-obsolete.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-#[deriving_clone] //~ ERROR `#[deriving_clone]` is obsolete; use `#[deriving(Clone)]` instead
-#[deriving_eq] //~ ERROR `#[deriving_eq]` is obsolete; use `#[deriving(Eq)]` instead
-#[deriving_iter_bytes]
-//~^ ERROR `#[deriving_iter_bytes]` is obsolete; use `#[deriving(IterBytes)]` instead
-struct Foo;
-
-pub fn main() { }