[change] Remove Slider

Ref #1352
Ref facebook/react-native#23313

Author: enigmaticsoul216

README.md

@@ -140,7 +140,6 @@ React Native v0.55
 | SafeAreaView             | ✓      |  |
 | ScrollView               | ✓      | Missing momentum scroll events ([#1021](https://github.com/necolas/react-native-web/issues/1021)). |
 | SectionList              | ✓      |  |
-| Slider                   | ✘      | Not started ([#1022](https://github.com/necolas/react-native-web/issues/1022)). |
 | StatusBar                | (✓)    | Mock. No equivalent web APIs. |
 | SwipeableFlatList        | ✓      |  |
 | SwipeableListView        | ✓      |  |

packages/babel-plugin-react-native-web/src/moduleMap.js

@@ -43,7 +43,6 @@ module.exports = {
   SectionList: true,
   Settings: true,
   Share: true,
-  Slider: true,
   SnapshotViewIOS: true,
   StatusBar: true,
   StatusBarIOS: true,

packages/react-native-web/src/exports/Slider/index.js

@@ -47,7 +47,6 @@ import RefreshControl from './exports/RefreshControl';
 import SafeAreaView from './exports/SafeAreaView';
 import ScrollView from './exports/ScrollView';
 import SectionList from './exports/SectionList';
-import Slider from './exports/Slider';
 import StatusBar from './exports/StatusBar';
 import SwipeableFlatList from './exports/SwipeableFlatList';
 import SwipeableListView from './exports/SwipeableListView';
@@ -139,7 +138,6 @@ export {
   SafeAreaView,
   ScrollView,
   SectionList,
-  Slider,
   StatusBar,
   SwipeableFlatList,
   SwipeableListView,