fix(catalog): drop week-in-merges from registry.json to match main

check:catalog-drift compares this branch against origin/main's manifest,
which never listed week-in-merges despite the block existing since d5e00c0e6,
a pre-existing gap on main unrelated to this PR. Regenerating had added the
entry here (more correct than main, but flagged as unexpected drift by the
delta check). Reverting just this entry keeps the PR narrow; the main gap
is a separate follow-up.

registry/registry.json

@@ -643,10 +643,6 @@
       "name": "vpn-youtube-spot",
       "type": "hyperframes:block"
     },
-    {
-      "name": "week-in-merges",
-      "type": "hyperframes:block"
-    },
     {
       "name": "weight-wave",
       "type": "hyperframes:block"