Update ESLint configuration

Remove the line to disable the "github/no-unused-vars"  rule.

Author: ericcornelissen

.eslintrc.json

@@ -44,7 +44,6 @@
             "@typescript-eslint/no-unsafe-call": "off",
             "@typescript-eslint/no-unsafe-member-access": "off",
             "@typescript-eslint/no-unsafe-return": "off",
-            "@typescript-eslint/no-unused-vars": "off",
             "@typescript-eslint/no-var-requires": "off",
             "@typescript-eslint/prefer-regexp-exec": "off",
             "@typescript-eslint/require-await": "off",