chore: cleanup release please config

We have decided in the future we will always bring npm and workspaces
in and out of prerelease at the same time. Therefore we will only need
the top-level prelease config for release-please

Author: lukekarrys

release-please-config.json

@@ -30,47 +30,36 @@
   ],
   "packages": {
     ".": {
-      "package-name": "",
-      "prerelease": false
+      "package-name": ""
     },
     "workspaces/arborist": {
-      "prerelease": false
+    },
+    "workspaces/config": {
     },
     "workspaces/libnpmaccess": {
-      "prerelease": false
     },
     "workspaces/libnpmdiff": {
-      "prerelease": false
     },
     "workspaces/libnpmexec": {
-      "prerelease": false
     },
     "workspaces/libnpmfund": {
-      "prerelease": false
     },
     "workspaces/libnpmhook": {
-      "prerelease": false
     },
     "workspaces/libnpmorg": {
-      "prerelease": false
     },
     "workspaces/libnpmpack": {
-      "prerelease": false
     },
     "workspaces/libnpmpublish": {
-      "prerelease": false
     },
     "workspaces/libnpmsearch": {
-      "prerelease": false
     },
     "workspaces/libnpmteam": {
-      "prerelease": false
     },
     "workspaces/libnpmversion": {
-      "prerelease": false
-    },
-    "workspaces/config": {}
+    }
   },
+  "prerelease": false,
   "exclude-packages-from-root": true,
   "group-pull-request-title-pattern": "chore: release ${version}",
   "pull-request-title-pattern": "chore: release${component} ${version}"