Bug 1330093 - Remove redundant rules from toolkit/.eslintrc.js. r=jaws

MozReview-Commit-ID: AKG6PYaoBmy

--HG--
extra : rebase_source : f5260e8de0b4ac65b41942c1f9314b2313cf2636

toolkit/.eslintrc.js

@@ -105,9 +105,6 @@ module.exports = {
     // No using !! where casting to boolean is already happening
     "no-extra-boolean-cast": "error",
 
-    // Disallow unnecessary labels
-    "no-extra-label": "error",
-
     // No double semicolon
     "no-extra-semi": "error",
 
@@ -183,12 +180,6 @@ module.exports = {
     // Disallow control flow statements in finally blocks
     "no-unsafe-finally": "error",
 
-    // Disallow negating the left operand of relational operators
-    "no-unsafe-negation": "error",
-
-    // Disallow unused labels
-    "no-unused-labels": "error",
-
     // No declaring variables that are never used
     "no-unused-vars": ["error", {
       "vars": "local",