chore: remove nested fields

This reverts commit 4a6d5f5452.

conf.json

@@ -0,0 +1,56 @@
+{
+  "stages": [
+    {
+      "name": "healthcheck",
+      "executor": {
+        "name": "sandbox",
+        "with": {
+          "default": {
+            "args": [
+              "/tmp/repo-health-checker",
+              "-root=.",
+              "-meta=readme",
+              "-repoSize=0.1"
+            ],
+            "env": [
+              "PATH=/usr/bin:/bin"
+            ],
+            "cpuLimit": 10000000000,
+            "memoryLimit": 104857600,
+            "procLimit": 50,
+            "copyInDir": ".",
+            "copyIn": {
+              "/tmp/repo-health-checker": {
+                "src": "./../../../../../../build/repo-health-checker"
+              }
+            },
+            "copyOut": [
+              "stdout",
+              "stderr"
+            ],
+            "stdin": {
+              "content": ""
+            },
+            "stdout": {
+              "name": "stdout",
+              "max": 4096
+            },
+            "stderr": {
+              "name": "stderr",
+              "max": 4096
+            }
+          }
+        }
+      },
+      "parsers": [
+        {
+          "name": "healthcheck",
+          "with": {
+            "score": 10,
+            "comment": " + comment from toml conf"
+          }
+        }
+      ]
+    }
+  ]
+}

expected.json

@@ -0,0 +1 @@
+[{"name":"healthcheck","results":[{"score":0,"comment":"### Repo Size Check Failed:\nRepository larger than 0.1 MiB. Please clean up or contact the teaching team.\n### Repo LFS Check Passed\n### Forbidden File Check Passed\n### Meta File Check Passed\n### Non-ASCII Characters File Check Passed\n### Non-ASCII Characters Commit Message Check Passed\n### Repo File Check Passed\n### Author Email Check Passed\n"}],"force_quit":true}]