hid ~/todo and commented failing example

Author: zaixrx

examples/struct/impl_cases.syn

@@ -1,10 +1,10 @@
-func method(self) { }
-
-struct Struct {}
-
-impl Struct {
-	func method_1(self, self) {}
-	func method_2(a: Int, self) {}
-}
+// func method(self) { }
+// 
+// struct Struct {}
+// 
+// impl Struct {
+// 	func method_1(self, self) {}
+// 	func method_2(a: Int, self) {}
+// }
 
 func main() {}