Remove unused record destructuring tests

These tests were for record destructuring, which has been removed.
The code for record destructuring was also removed from the type checker
and types modules.

src/ast/compiler/type_checker.rs

@@ -627,15 +627,6 @@ mod tests {
         assert_eq!(get_ret_type(&result.unwrap()), StaticType::Int);
     }
 
-    #[test]
-    fn test_destructuring_record_args() {
-        let env = crate::ast::environment::Environment::new();
-        // ((fn [[x y]] (+ x y)) {:a 5 :b 7}) -> 12
-        let result = env.compile("((fn [[x y]] (+ x y)) {:a 5 :b 7})");
-        assert!(result.is_ok());
-        assert_eq!(get_ret_type(&result.unwrap()), StaticType::Int);
-    }
-
     fn get_ret_type(node: &TypedNode) -> StaticType {
         if let StaticType::Function(sig) = &node.ty {
             sig.ret.clone()