remove some error suppressions

config/test/test-setup.ts

@@ -35,7 +35,6 @@ if (typeof window !== "undefined") {
     // Override the window.location implementation to mock out assign()
     // We need to access window.location.assign to verify that we're
     // redirecting to the right place.
-    /* eslint-disable no-restricted-syntax */
     const oldLocation = window.location;
     // @ts-expect-error - TS2790 - The operand of a 'delete' operator must be optional.
     delete window.location;

packages/perseus/src/hints-renderer.tsx

@@ -1,4 +1,3 @@
-/* eslint-disable @khanacademy/ts-no-error-suppressions */
 import * as PerseusLinter from "@khanacademy/perseus-linter";
 import {StyleSheet, css} from "aphrodite";
 import classnames from "classnames";

packages/perseus/src/interactive2/wrapped-drawing.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @babel/no-invalid-this */
 /**
  * Default methods for a wrapped movable.
  */

packages/perseus/src/perseus-markdown.tsx

@@ -1,4 +1,3 @@
-/* eslint-disable no-useless-escape, no-prototype-builtins */
 import {pureMarkdownRules} from "@khanacademy/pure-markdown";
 import SimpleMarkdown from "@khanacademy/simple-markdown";
 import * as React from "react";
@@ -201,7 +200,7 @@ const rules = {
             // link was not put together properly, let's make sure it's there so we
             // don't break the entire page.
             const isKAUrl = href
-                ? href.match(/https?:\/\/[^\/]*khanacademy.org|^\//)
+                ? href.match(/https?:\/\/[^/]*khanacademy.org|^\//)
                 : false;
             if (!isKAUrl) {
                 // Prevents "reverse tabnabbing" phishing attacks

packages/perseus/src/util.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @babel/no-invalid-this, getter-return */
 import {Errors, PerseusError} from "@khanacademy/perseus-core";
 import _ from "underscore";