docs: remove extra announcement (#2641)

announcements-extra.json

@@ -1,7 +1,2 @@
 [
-  {
-    "id": "#2639",
-    "title": "Need Help! Please test the next version (1.107.1) on Linux arm64",
-    "url": "https://github.com/VSCodium/vscodium/discussions/2639"
-  }
 ]