Remove old Typescript-*-Starter user tests (#40752)

This only removes the ones with repos that are now readonly; some repos
are still getting updates, so I left them in as tests.

Neither one fails right now, so there's no .log files to delete from the
baselines.

tests/cases/user/TypeScript-React-Starter/test.json

@@ -1,4 +0,0 @@
-{
-    "cloneUrl": "https://github.com/Microsoft/TypeScript-React-Starter.git",
-    "types": ["jest", "node"]
-}

tests/cases/user/TypeScript-Vue-Starter/test.json

@@ -1,4 +0,0 @@
-{
-    "cloneUrl": "https://github.com/Microsoft/TypeScript-Vue-Starter.git",
-    "types": ["jest"]
-}