Auto merge of #15649 - zimio:issue-15591-rewrite-ban-type-lint, r=Wafflespeanut

Rewrite the ban-type lint in Python

<!-- Please describe your changes on the following line: -->
Rewrite the ban-type lint in Python.

Question: Should the old ban-type lint written in rust be deleted?

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x ] `./mach build -d` does not report any errors
- [x ] `./mach test-tidy` does not report any errors
- [x ] These changes fix #15591

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- [ x] There are tests for these changes

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tests/compiletest/plugin/compile-fail/ban-domrefcell.rs

@@ -1,19 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#![feature(plugin)]
-#![plugin(script_plugins)]
-
-extern crate script;
-
-use script::test::DOMRefCell;
-use script::test::JS;
-use script::test::Node;
-
-struct Foo {
-    bar: DOMRefCell<JS<Node>>
-    //~^ ERROR Banned type DOMRefCell<JS<T>> detected. Use MutJS<JS<T>> instead
-}
-
-fn main() {}

tests/compiletest/plugin/compile-fail/ban.rs

@@ -1,18 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#![feature(plugin)]
-#![plugin(script_plugins)]
-
-extern crate js;
-
-use js::jsval::JSVal;
-use std::cell::Cell;
-
-struct Foo {
-    bar: Cell<JSVal>
-    //~^ ERROR Banned type Cell<JSVal> detected. Use MutJS<JSVal> instead
-}
-
-fn main() {}