diff --git a/src/comp/front/ast.rs b/src/comp/front/ast.rs
index 6efda692913a..e17614d3fac7 100644
--- a/src/comp/front/ast.rs
+++ b/src/comp/front/ast.rs
@@ -6,7 +6,6 @@ import util::common::span;
 import util::common::spanned;
 import util::common::ty_mach;
 import util::common::filename;
-import middle::tstate::ann::ts_ann;
 
 type ident = str;
 
@@ -95,7 +94,7 @@ type meta_item_ = rec(ident name, str value);
 type block = spanned[block_];
 type block_ = rec(vec[@stmt] stmts,
                   option::t[@expr] expr,
-                  ann a); /* ann is only meaningful for the ts_ann field */
+                  ann a);
 
 type pat = spanned[pat_];
 tag pat_ {
@@ -201,8 +200,6 @@ tag mode {
 
 type stmt = spanned[stmt_];
 tag stmt_ {
-/* Only the ts_ann field is meaningful for statements,
-   but we make it an ann to make traversals simpler */
     stmt_decl(@decl, ann); 
     stmt_expr(@expr, ann);
     // These only exist in crate-level blocks.
diff --git a/src/comp/middle/ty.rs b/src/comp/middle/ty.rs
index 06b1d8e36e59..8e1e5e82c314 100644
--- a/src/comp/middle/ty.rs
+++ b/src/comp/middle/ty.rs
@@ -33,7 +33,6 @@ import util::common::ty_f64;
 
 import util::common::new_def_hash;
 import util::common::span;
-import middle::tstate::ann::ts_ann;
 
 import util::data::interner;
 
diff --git a/src/comp/util/common.rs b/src/comp/util/common.rs
index fea905ebdb74..582ab3b67c72 100644
--- a/src/comp/util/common.rs
+++ b/src/comp/util/common.rs
@@ -9,7 +9,6 @@ import front::ast;
 import front::ast::ty;
 import front::ast::pat;
 import middle::walk;
-import middle::tstate::ann::ts_ann;
 
 import std::io::stdout;
 import std::io::str_writer;