Remove the global 'vec::to_owned' function

src/libsyntax/ext/log_syntax.rs

@@ -15,7 +15,6 @@ use ext::base;
 use print;
 use parse::token::{get_ident_interner};
 
-use std::vec;
 use std::io;
 
 pub fn expand_syntax_ext(cx: @ExtCtxt,
@@ -26,7 +25,7 @@ pub fn expand_syntax_ext(cx: @ExtCtxt,
     cx.print_backtrace();
     io::stdout().write_line(
         print::pprust::tt_to_str(
-            &ast::tt_delim(vec::to_owned(tt)),
+            &ast::tt_delim(tt.to_owned()),
             get_ident_interner()));
 
     //trivial expression