Merge pull request #113 from andygrove/revert-78-visitor

Revert "Add an AST visitor"

Author: andygrove

src/sqlast/mod.rs

@@ -17,7 +17,6 @@ mod query;
 mod sql_operator;
 mod sqltype;
 mod value;
-pub mod visit;
 
 use std::ops::Deref;