chore(jscs): remove .jscs.json.todo, rename config to .jscsrc

Closes #11993

.jscs.json.todo

@@ -1,15 +0,0 @@
-// This is an incomplete TODO list of checks we want to start enforcing
-//
-// The goal is to enable these checks one by one by moving them to .jscs.json along with commits
-// that correct the existing code base issues and make the new check pass.
-
-{
-  "validateParameterSeparator": ", ", // Re-assert this rule when JSCS allows multiple spaces
-  "requireCurlyBraces": ["if", "else", "for", "while", "do", "try", "catch"],
-  "disallowImplicitTypeConversion": ["string"],
-  "disallowMultipleLineBreaks": true,
-  "validateJSDoc": {
-    "checkParamNames": true,
-    "requireParamTypes": true
-  }
-}

Gruntfile.js

@@ -158,7 +158,7 @@ module.exports = function(grunt) {
     jscs: {
       src: ['src/**/*.js', 'test/**/*.js'],
       options: {
-        config: ".jscs.json"
+        config: ".jscsrc"
       }
     },