auto merge of #6500 : kud1ing/rust/cleanup, r=bstrie

Fixes #6445

Author: bors

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",

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-    cx.span_err(span, ~"`#[deriving_clone]` is obsolete; use `#[deriving(Clone)]` instead");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;

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-    cx.span_err(span, ~"`#[deriving_eq]` is obsolete; use `#[deriving(Eq)]` instead");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
-}

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],