rustdoc: Remove a now invalid test

Author: erickt

src/librustdoc/tystr_pass.rs

@@ -434,13 +434,6 @@ mod test {
             "struct S {"));
     }
 
-    #[test]
-    fn should_not_serialize_struct_drop_blocks() {
-        // All we care about are the fields
-        let doc = mk_doc(~"struct S { field: (), drop { } }");
-        assert!(!(&doc.cratemod().structs()[0].sig).get().contains("drop"));
-    }
-
     #[test]
     fn should_not_serialize_struct_attrs() {
         // All we care about are the fields