general improvements around `AST_ForIn` (#2796)

- compress using `collapse_vars`
- remove unused `name`
- simplify `loop_body`

1 files changed, 1 insertions, 2 deletions

diff --git a/lib/ast.js b/lib/ast.js
index 65918675..4e41659c 100644
--- a/lib/ast.js
+++ b/lib/ast.js
@@ -267,11 +267,10 @@ var AST_For = DEFNODE("For", "init condition step", {
     }
 }, AST_IterationStatement);
 
-var AST_ForIn = DEFNODE("ForIn", "init name object", {
+var AST_ForIn = DEFNODE("ForIn", "init object", {
     $documentation: "A `for ... in` statement",
     $propdoc: {
         init: "[AST_Node] the `for/in` initialization code",
-        name: "[AST_SymbolRef?] the loop variable, only if `init` is AST_Var",
         object: "[AST_Node] the object that we're looping through"
     },
     _walk: function(visitor) {