tools: remove no-return-await lint rule

no-return-await rule was deprecated in ESLint 8.46.0. According to the
ESLint docs removing `await` can make the code slower.

Refs: https://eslint.org/docs/latest/rules/no-return-await
PR-URL: #50118
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: sapphi-red

.eslintrc.js

@@ -256,7 +256,6 @@ module.exports = {
         message: 'Use `globalThis.crypto`.',
       },
     ],
-    'no-return-await': 'error',
     'no-self-compare': 'error',
     'no-tabs': 'error',
     'no-template-curly-in-string': 'error',