ui: remove misleading training template problemId

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.34.25",
+  "version": "4.34.26",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",

packages/ui-default/templates/partials/training_default.json

@@ -3,7 +3,7 @@
     "_id": 1,
     "title": "最初的最初 - A+B Problem",
     "requireNids": [],
-    "pids": [1, "P1001"]
+    "pids": [1]
   },
   {
     "_id": 2,