Reapply "Remove extraneous test"

This reverts commit 51c093d.

Author: NullVoxPopuli

test-packages/package-test-core/__tests__/language-server/hover.test.ts

@@ -130,25 +130,6 @@ describe('Language Server: Hover (ts plugin)', () => {
     `);
   });
 
-  describe('MathML', () => {
-    test('empty <math>', async () => {
-      const [offset, content] = extractCursor(stripIndent`
-        <template>
-          <ma%th>
-          </math>
-        </template>
-      `);
-
-      const doc = await prepareDocument(
-        'ts-template-imports-app/src/ephemeral.gts',
-        'glimmer-ts',
-        content,
-      );
-
-      expect(await performHoverRequest(doc, offset)).toMatchInlineSnapshot();
-    });
-  });
-
   describe.skip('JS in a TS project', () => {
     test('with allowJs: true', async () => {
       const [offset, content] = extractCursor(stripIndent`