test(language-service): Remove test for external template (#32017)

The tsserver is not meant to handle HTML files, so there is no point
sending an "open" request. The existing test is wrong because the
quickinfo returns "const name: never", which should be
"(property) WidgetComponent.name"

PR Close #32017

integration/language_service_plugin/goldens/quickinfo_externalTemplate.json

@@ -1,22 +0,0 @@
-{
-  "seq": 0,
-  "type": "response",
-  "command": "quickinfo",
-  "request_seq": 4,
-  "success": true,
-  "body": {
-    "kind": "const",
-    "kindModifiers": "declare",
-    "start": {
-      "line": 1,
-      "offset": 17
-    },
-    "end": {
-      "line": 1,
-      "offset": 21
-    },
-    "displayString": "const name: never",
-    "documentation": "",
-    "tags": []
-  }
-}

integration/language_service_plugin/test.ts

@@ -117,17 +117,6 @@ describe('Angular Language Service', () => {
       offset: 28,
     });
     expect(resp2).toMatchGolden('quickinfo.json');
-
-    client.sendRequest('open', {
-      file: `${PWD}/project/app/widget.component.html`,
-    });
-
-    const resp3 = await client.sendRequest('quickinfo', {
-      file: `${PWD}/project/app/widget.component.html`,
-      line: 1,
-      offset: 19,
-    });
-    expect(resp3).toMatchGolden('quickinfo_externalTemplate.json');
   });
 
   it('should perform definition', async () => {