chore: remove old parser

tools/challenge-parser/parser/plugins/__snapshots__/add-video-question.test.js.snap

@@ -0,0 +1,18 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`add-video-question plugin should match the video snapshot 1`] = `
+Object {
+  "question": Object {
+    "answers": Array [
+      "<p>Some inline <code>code</code></p>",
+      "<p>Some <em>italics</em></p>
+<p>A second answer paragraph.</p>",
+      "<p><code> code in </code> code tags</p>",
+    ],
+    "solution": 3,
+    "text": "<p>Question line 1</p>
+<pre><code class=\\"language-js\\">  var x = 'y';
+</code></pre>",
+  },
+}
+`;