Cleanup unused imports

src/comp/syntax/ext/base.rs

@@ -1,4 +1,4 @@
-import std::{str, vec, option};
+import std::{vec, option};
 import std::map::hashmap;
 import driver::session::session;
 import codemap::span;

src/comp/syntax/ext/env.rs

@@ -4,7 +4,7 @@
  * should all get sucked into either the compiler syntax extension plugin
  * interface.
  */
-import std::{vec, str, option, generic_os};
+import std::{vec, option, generic_os};
 import base::*;
 export expand_syntax_ext;
 

src/comp/syntax/ext/expand.rs

@@ -3,7 +3,7 @@ import driver::session;
 import std::option::{none, some};
 
 import std::map::hashmap;
-import std::{vec, str};
+import std::{vec};
 
 import syntax::ast::{crate, expr_, expr_mac, mac_invoc};
 import syntax::fold::*;

src/comp/syntax/ext/fmt.rs

@@ -6,7 +6,7 @@
  * compiler syntax extension plugin interface.
  */
 import std::{vec, str, option};
-import std::option::{none, some};
+import std::option::{some};
 import std::extfmt::ct::*;
 import base::*;
 import codemap::span;

src/comp/syntax/ext/ident_to_str.rs

@@ -1,4 +1,4 @@
-import std::{vec, str, option};
+import std::{vec, option};
 import base::*;
 import syntax::ast;
 

src/comp/syntax/ext/log_syntax.rs

@@ -1,4 +1,4 @@
-import std::{str, option};
+import std::{option};
 import base::*;
 import syntax::ast;
 

src/comp/syntax/ext/simplext.rs

@@ -1,16 +1,15 @@
 use std;
 
 import codemap::span;
-import std::{vec, str, option};
+import std::{vec, option};
 import std::map::{hashmap, new_str_hash};
 import option::{some, none};
 
-import base::{syntax_extension, ext_ctxt, normal,
-              expr_to_str, expr_to_ident};
+import base::{ext_ctxt, normal};
 
 import fold::*;
 import ast_util::respan;
-import ast::{ident, path, ty, blk, blk_, expr, expr_, path_, expr_path,
+import ast::{ident, path, ty, blk_, expr, path_, expr_path,
              expr_vec, expr_mac, mac_invoc, node_id};
 
 export add_new_extension;