tools: implement no-unused-vars for eslint

Trott · Fishrock123 · commit 386030b5248e · 2016-01-06T12:11:00.000-05:00
PR-URL: nodejs#4536 Reviewed-By: Rod Vagg <rod@vagg.org> Reviewed-By: Michaël Zasso <mic.besace@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
diff --git a/.eslintrc b/.eslintrc
@@ -84,6 +84,8 @@ rules:
   # list: https://github.com/eslint/eslint/tree/master/docs/rules#variables
   ## disallow use of undefined variables (globals)
   no-undef: 2
+  ## disallow declaration of variables that are not used in the code
+  no-unused-vars: [2, {"args": "none"}]
 
   # Custom rules in tools/eslint-rules
   require-buffer: 2
