eslintrc: fix double config

Author: clairep94

.eslintrc

@@ -41,7 +41,6 @@
     "no-promise-executor-return": 0, //temporarily off
     "no-restricted-exports": 1,
     "no-underscore-dangle": 0,
-    "no-underscore-dangle": 0,
     "no-useless-catch": 2,
     "prefer-object-spread": 0,
     "max-len": [1, 120, 2, {"ignoreComments": true, "ignoreTemplateLiterals": true}],