message: docs: remove mention of data-vv-value-path to discourage its use
diff: You might have a custom component that you want to treat as an input. Like a custom input field, it would have its own validator instance, but you want to validate it in the parent scope because it is simply just an input with some whistles on top. You can achieve this by using the directive normally like you would on a regular input element, but you must make sure that your component satisfies the following:
  - Must emit an `input` event whenever the value changes.
  -- Should have a `value` and `name` getters define in the components `$_veeValidate` [ctor options](/concepts/components.md) alternatively it can use the `data-vv-name` and `data-vv-value-path` as fallbacks.
  +- Should have a `value` and `name` getters define in the components `$_veeValidate` [ctor options](/concepts/components.md) alternatively it can use the `data-vv-name` as a fallback for the `name` prop.
  <iframe src="https://codesandbox.io/embed/y3504yr0l1?initialpath=%2F%23%2Fcustom&module=%2Fsrc%2Fcomponents%2FCustom.vue&view=preview" style="width:100%; height:500px; border:0; border-radius: 4px; overflow:hidden;" sandbox="allow-modals allow-forms allow-popups allow-scripts allow-same-origin"></iframe>
  