test: drop the ColorOverlay duplicate-registration ledger entry

The custom-node console ledger (#15225, landed on main after this branch
was cut) requires the ColorOverlay duplicate-registration error to be
observed at startup:

  requiredStartupId: 'duplicate-color-overlay'
  pattern: /\[vite:preloadError\].*Extension named 'ColorOverlay' already registered\./

That error was the throw this PR removes. Registering a duplicate name now
warns and skips, so dz_node_palette.js finishes evaluating and emits no
preloadError - the pattern can never match again, since the message it
matches no longer exists in the frontend. Left in place,
staleRequiredStartupErrorRulesForPacks would report
ComfyUI_LayerStyle_Advance/duplicate-color-overlay and fail the nightly
suite's stale-rule assertion.

Removing the entry is the ledger's documented lifecycle for a mechanism
that stops firing, and it tightens rather than loosens the gate: the pack
no longer carries a suppression, so a duplicate-registration error
reappearing would surface as unallowlisted.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: mattmillerai

browser_tests/fixtures/customNode/consoleErrorLedger.ts

@@ -170,19 +170,6 @@ const CONSOLE_ERROR_ALLOWLIST: Record<string, AllowlistRule[]> = {
         'skip metadata requests without a node name and remove this entry'
     }
   ],
-  ComfyUI_LayerStyle_Advance: [
-    {
-      id: 'duplicate-color-overlay',
-      pattern:
-        /\[vite:preloadError\].*Extension named 'ColorOverlay' already registered\./,
-      global: true,
-      requiredStartupId: 'duplicate-color-overlay',
-      reason:
-        'this pack and comfyui_layerstyle both register the ColorOverlay extension in their pinned dz_node_palette.js',
-      restore:
-        'give the extensions distinct names and remove this entry when both packs load without a duplicate-registration error'
-    }
-  ],
   'comfyui-sam3': [
     {
       id: 'sam3-editor-legacy-clipspace-import',