remove Portal docs

docs/components/Portal.md

@@ -1,68 +0,0 @@
-# Portal
-
-`Portal` is used to render modal content on top of everything else in the
-application. It passes modal views all the way up to the root element created
-by `AppRegistry.runApplication`.
-
-There can only be one `Portal` instance rendered in an application, and this
-instance is controlled by React Native for Web.
-
-## Methods
-
-static **allocateTag**()
-
-Creates a new unique tag for the modal that your component is rendering. A
-good place to allocate a tag is in `componentWillMount`. Returns a string. See
-`showModal` and `closeModal`.
-
-static **closeModal**(tag: string)
-
-Remove a modal from the collection of modals to be rendered. The `tag` must
-exactly match the tag previous passed to `showModal` to identify the React
-component.
-
-static **getOpenModals**()
-
-Get an array of all the open modals, as identified by their tag string.
-
-static **showModal**(tag: string, component: any)
-
-Render a new modal. The `tag` must be unique as it is used to identify the
-React component to render.  This same tag can later be used in `closeModal`.
-
-## Examples
-
-```js
-import React, { Component } from 'react'
-import { Portal, Text, Touchable } from 'react-native'
-
-export default class PortalExample extends Component {
-  componentWillMount() {
-    this._portalTag = Portal.allocateTag()
-  }
-
-  render() {
-    return (
-      <Touchable onPress={this._handlePortalOpen.bind(this)}>
-        <Text>Open portal</Text>
-      </Touchable>
-    )
-  }
-
-  _handlePortalClose(e) {
-    Portal.closeModal(this._portalTag)
-  }
-
-  _handlePortalOpen(e) {
-    Portal.showModal(this._portalTag, this._renderPortalContent())
-  }
-
-  _renderPortalContent() {
-    return (
-      <Touchable onPress={this._handlePortalClose.bind(this)}>
-        <Text>Close portal</Text>
-      </Touchable>
-    )
-  }
-}
-```