Remove unused variables (#22097)

Summary:
Fix unused variable ESLint warnings.
Pull Request resolved: https://github.com/facebook/react-native/pull/22097

Differential Revision: D12919249

Pulled By: TheSavior

fbshipit-source-id: f680fa7277c58cf685e70dfb911753a30fe01c1d

IntegrationTests/ImageSnapshotTest.js

@@ -12,7 +12,7 @@
 
 const React = require('react');
 const ReactNative = require('react-native');
-const {Image, View} = ReactNative;
+const {Image} = ReactNative;
 const {TestModule} = ReactNative.NativeModules;
 
 class ImageSnapshotTest extends React.Component<{}> {

IntegrationTests/WebSocketTest.js

@@ -18,12 +18,6 @@ const {TestModule} = ReactNative.NativeModules;
 const DEFAULT_WS_URL = 'ws://localhost:5555/';
 
 const WS_EVENTS = ['close', 'error', 'message', 'open'];
-const WS_STATES = [
-  /* 0 */ 'CONNECTING',
-  /* 1 */ 'OPEN',
-  /* 2 */ 'CLOSING',
-  /* 3 */ 'CLOSED',
-];
 
 type State = {
   url: string,
@@ -50,7 +44,6 @@ class WebSocketTest extends React.Component<{}, State> {
 
   _waitFor = (condition: any, timeout: any, callback: any) => {
     let remaining = timeout;
-    let t;
     const timeoutFunction = function() {
       if (condition()) {
         callback(true);
@@ -60,10 +53,10 @@ class WebSocketTest extends React.Component<{}, State> {
       if (remaining === 0) {
         callback(false);
       } else {
-        t = setTimeout(timeoutFunction, 1000);
+        setTimeout(timeoutFunction, 1000);
       }
     };
-    t = setTimeout(timeoutFunction, 1000);
+    setTimeout(timeoutFunction, 1000);
   };
 
   _connect = () => {
@@ -121,39 +114,30 @@ class WebSocketTest extends React.Component<{}, State> {
   }
 
   testConnect = () => {
-    const component = this;
-    component._connect();
-    component._waitFor(component._socketIsConnected, 5, function(
-      connectSucceeded,
-    ) {
+    this._connect();
+    this._waitFor(this._socketIsConnected, 5, connectSucceeded => {
       if (!connectSucceeded) {
         TestModule.markTestPassed(false);
         return;
       }
-      component.testSendAndReceive();
+      this.testSendAndReceive();
     });
   };
 
   testSendAndReceive = () => {
-    const component = this;
-    component._sendTestMessage();
-    component._waitFor(component._receivedTestExpectedResponse, 5, function(
-      messageReceived,
-    ) {
+    this._sendTestMessage();
+    this._waitFor(this._receivedTestExpectedResponse, 5, messageReceived => {
       if (!messageReceived) {
         TestModule.markTestPassed(false);
         return;
       }
-      component.testDisconnect();
+      this.testDisconnect();
     });
   };
 
   testDisconnect = () => {
-    const component = this;
-    component._disconnect();
-    component._waitFor(component._socketIsDisconnected, 5, function(
-      disconnectSucceeded,
-    ) {
+    this._disconnect();
+    this._waitFor(this._socketIsDisconnected, 5, disconnectSucceeded => {
       TestModule.markTestPassed(disconnectSucceeded);
     });
   };

Libraries/Components/ScrollView/ScrollView.js

@@ -26,7 +26,6 @@ const flattenStyle = require('flattenStyle');
 const invariant = require('fbjs/lib/invariant');
 const processDecelerationRate = require('processDecelerationRate');
 const requireNativeComponent = require('requireNativeComponent');
-const warning = require('fbjs/lib/warning');
 const resolveAssetSource = require('resolveAssetSource');
 
 import type {PressEvent} from 'CoreEventTypes';

Libraries/Core/Devtools/setupDevtools.js

@@ -10,16 +10,6 @@
 
 'use strict';
 
-type DevToolsPluginConnection = {
-  isAppActive: () => boolean,
-  host: string,
-  port: number,
-};
-
-type DevToolsPlugin = {
-  connectToDevTools: (connection: DevToolsPluginConnection) => void,
-};
-
 let register = function() {
   // noop
 };

Libraries/Experimental/Incremental.js

@@ -92,7 +92,6 @@ export type Props = {
   name: string,
   children: React.Node,
 };
-
 type State = {
   doIncrementalRender: boolean,
 };

local-cli/link/__tests__/ios/getProducts.spec.js

@@ -1,31 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @format
- * @emails oncall+javascript_foundation
- */
-
-'use strict';
-
-const xcode = require('xcode');
-const getProducts = require('../../ios/getProducts');
-const path = require('path');
-
-const project = xcode.project(
-  path.join(__dirname, '../../__fixtures__/project.pbxproj'),
-);
-
-describe('ios::getProducts', () => {
-  beforeEach(() => {
-    project.parseSync();
-  });
-
-  it('should return an array of static libraries project exports', () => {
-    const products = getProducts(project);
-    expect(products.length).toBe(1);
-    expect(products).toContain('libRCTActionSheet.a');
-  });
-});

local-cli/link/ios/getProducts.js

@@ -1,20 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @format
- */
-
-/**
- * Given xcodeproj it returns list of products ending with
- * .a extension, so that we know what elements add to target
- * project static library
- */
-module.exports = function getProducts(project) {
-  return project
-    .pbxGroupByName('Products')
-    .children.map(c => c.comment)
-    .filter(c => c.indexOf('.a') > -1);
-};

local-cli/link/ios/registerNativeModule.js

@@ -10,19 +10,16 @@
 const xcode = require('xcode');
 const fs = require('fs');
 const path = require('path');
-const log = require('npmlog');
 
 const addToHeaderSearchPaths = require('./addToHeaderSearchPaths');
 const getHeadersInFolder = require('./getHeadersInFolder');
 const getHeaderSearchPath = require('./getHeaderSearchPath');
-const getProducts = require('./getProducts');
 const getTargets = require('./getTargets');
 const createGroupWithMessage = require('./createGroupWithMessage');
 const addFileToProject = require('./addFileToProject');
 const addProjectToLibraries = require('./addProjectToLibraries');
 const addSharedLibraries = require('./addSharedLibraries');
 const isEmpty = require('lodash').isEmpty;
-const getGroup = require('./getGroup');
 
 /**
  * Register native module IOS adds given dependency to project by adding

scripts/android-e2e-test.js

@@ -147,7 +147,6 @@ describe('Android Test App', function() {
   });
 
   it('should have Debug In Chrome working', function() {
-    const androidAppCode = fs.readFileSync('index.js', 'utf-8');
     // http://developer.android.com/reference/android/view/KeyEvent.html#KEYCODE_MENU
     return driver
       .waitForElementByXPath(