clean release notes

tool/release_notes/release_notes.json

diff --git a/tool/release_notes/release_notes.json b/tool/release_notes/release_notes.json
index 6e08ea3..ff9782c 100644
--- a/tool/release_notes/release_notes.json
+++ b/tool/release_notes/release_notes.json
@@ -8,58 +8,36 @@
   },
   "sections": [
     {
-      "name": "Inspector updates",
-      "notes": [
-        {
-          "githubPullRequestUrls": [
-            "https://github.com/flutter/devtools/pull/4527"
-          ],
-          "message": "Auto scrolling behavior improved when snapping to a widget into focus",
-          "imageNames": [
-            "image1.png"
-          ]
-        },
-        {
-          "githubPullRequestUrls": [
-            "https://github.com/flutter/devtools/pull/4527"
-          ],
-          "message": "Fix issue where widget inspector wouldn't load when connecting to a paused  app",
-          "imageNames": null
-        },
-        {
-          "githubPullRequestUrls": [
-            "https://github.com/flutter/devtools/pull/4572"
-          ],
-          "message": "Improve widget inspector hover cards to show progress while waiting for data",
-          "imageNames": null
-        }
-      ]
+      "name": "General updates",
+      "notes": []
+    },
+    {
+      "name": "Inspector update",
+      "notes": []
     },
     {
       "name": "Performance updates",
-      "notes": [
-        {
-          "githubPullRequestUrls": [
-            "https://github.com/flutter/devtools/pull/45337"
-          ],
-          "message": "Fix issue where scrollbar would go out of sync with the frame content",
-          "imageNames": null
-        },
-        {
-          "githubPullRequestUrls": [
-            "https://github.com/flutter/devtools/pull/4491"
-          ],
-          "message": "Add offline support for raster stats",
-          "imageNames": null
-        },
-        {
-          "githubPullRequestUrls": [
-            "https://github.com/flutter/devtools/pull/4474"
-          ],
-          "message": "Add 'Rendering time' column to Raster Metrics tab",
-          "imageNames": null
-        }
-      ]
+      "notes": []
+    },
+    {
+      "name": "CPU profiler updates",
+      "notes": []
+    },
+    {
+      "name": "Memory updates",
+      "notes": []
+    },
+    {
+      "name": "Network profiler updates",
+      "notes": []
+    },
+    {
+      "name": "Logging updates",
+      "notes": []
+    },
+    {
+      "name": "App size tool updates",
+      "notes": []
     }
   ]
 }
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