{
  "plugins": [
    "transform-exponentiation-operator",
    "transform-regenerator",
    "transform-template-literals",
    "transform-literals",
    "transform-arrow-functions",
    "transform-block-scoped-functions",
    "transform-classes",
    "transform-object-super",
    "transform-shorthand-properties",
    "transform-computed-properties",
    "transform-for-of",
    "transform-sticky-regex",
    "transform-unicode-regex",
    "check-constants",
    "transform-spread",
    "transform-parameters",
    "transform-destructuring",
    "transform-block-scoping",
    "transform-typeof-symbol",
    "transform-regenerator"
  ]
}

{
  "plugins": [
    "transform-exponentiation-operator",
    "transform-template-literals",
    "transform-literals",
    "transform-arrow-functions",
    "transform-block-scoped-functions",
    "transform-classes",
    "transform-object-super",
    "transform-shorthand-properties",
    "transform-computed-properties",
    "transform-for-of",
    "transform-sticky-regex",
    "transform-unicode-regex",
    "check-constants",
    "transform-spread",
    "transform-parameters",
    "transform-destructuring",
    "transform-block-scoping",
    "transform-typeof-symbol",
    "transform-regenerator"
  ]
}

Remove duplicate from plugin list.
Remove duplicate from plugin list.
