TypeScript linter warning: no-unused-variable is deprecated; but I'm not using this config
no-unused-variable is deprecated. Since TypeScript 2.9. Please use the built-in compiler checks instead.
Remove deprecated
no-unused-variablefrom your or dependencytslint.jsonfile.Specify the following compiler options in yourtsconfig.jsonfile.
"compilerOptions": { "noUnusedLocals": true, /* Report errors on unused locals. */ "noUnusedParameters": true /* Report errors on unused parameters. */}
As it says, tslint deprecated that rule (more info here https://github.com/palantir/tslint/pull/3919)
Check your tslint.json, and remove the rule and the warning should disappear.
Not only support for no-unused-variable rule, but the whole TSLint has been deprecated in favor of typescript-eslint.
Consider migration to new linter.