fix: removed comments from devcontainer.json

Author: Akanshu-2u

.devcontainer/devcontainer.json

@@ -2,25 +2,6 @@
     "hostRequirements": {
         "cpus": 8
     },
-
-    /* TEMPORARY WORKAROUND:
-        This removes the legacy Yarn APT repository to unblock Codespaces pre-builds
-        failing with:
-            GPG error: https://dl.yarnpkg.com/debian
-            stable InRelease: The following signatures were invalid:
-            EXPKEYSIG 23E7166788B63E1E Yarn Packaging <[email protected]>
-
-        Root cause: expired/invalid Yarn signing key in the default Microsoft
-        devcontainer base image causing `apt-get update` to fail and abort
-        devcontainer feature installation.
-
-        Tracking:
-        - https://2u-internal.atlassian.net/browse/BOMS-394
-        - https://2u-internal.atlassian.net/browse/BOMS-402
-
-        IMPORTANT: Revert this change after confirming the upstream image no longer
-        includes the broken Yarn APT configuration.*/
-
     "build": {
         "dockerfile": "Dockerfile"
     },