chore(eslint): enable no-invalid-argument-count

The rule reports nothing on the current tree. The count the entry carried, and
the false-positive risk it warned about, predate the v72 rewrite of the rule.

Author: BridgeAR

eslint.config.mjs

@@ -620,7 +620,6 @@ export default [
       'unicorn/no-declarations-before-early-exit': 'off', // 62 errors
       'unicorn/no-error-property-assignment': 'off', // 6 errors | all preserve upstream error metadata
       'unicorn/no-for-loop': 'off', // Activate if this is resolved https://github.com/sindresorhus/eslint-plugin-unicorn/issues/2664
-      'unicorn/no-invalid-argument-count': 'off', // 98 errors | high false-positive risk, worth a focused pass
       'unicorn/no-nonstandard-builtin-properties': 'off', // 34 errors | needs an audit
       'unicorn/no-this-assignment': 'off', // This would need some further refactoring and the benefit is small
       'unicorn/no-undeclared-class-members': 'off', // 272 errors | requires declaring every field