Trim imports

Author: catamorphism

src/comp/middle/tstate/auxiliary.rs

@@ -28,10 +28,6 @@ import front::ast::return;
 import front::ast::expr_field;
 
 import middle::ty::expr_ann;
-import middle::fold;
-import middle::fold::respan;
-import middle::fold::new_identity_fold;
-import middle::fold::fold_block;
 
 import util::common;
 import util::common::span;

src/comp/middle/tstate/states.rs

@@ -148,9 +148,6 @@ import front::ast::stmt_expr;
 import front::ast::block;
 import front::ast::block_;
 
-import middle::fold::span;
-import middle::fold::respan;
-
 import util::common::new_def_hash;
 import util::common::decl_lhs;
 import util::common::uistr;