Remove unnecessary config copy

[tianfeng92]

Notice this warning msg for cypress 10

The following configuration option is invalid:

 - testingType

It's because of unnecessary config copy for cypress.run() and the result is like

cypressOpts:  {
  testingType: 'e2e',
  config: {
    specPattern: [ 'cypress/e2e/**/*.js' ],
    excludeSpecPattern: [],
    ...
    testingType: 'e2e'
  }
}

cypress throws warning for the nested testingType under config