[No QA] Remove sleep timer code

src/libs/NetworkConnection.js

@@ -2,14 +2,12 @@ import _ from 'underscore';
 import Onyx from 'react-native-onyx';
 import NetInfo from './NetInfo';
 import ONYXKEYS from '../ONYXKEYS';
-import SleepTimer from './SleepTimer';
 import AppStateMonitor from './AppStateMonitor';
 import promiseAllSettled from './promiseAllSettled';
 
 // NetInfo.addEventListener() returns a function used to unsubscribe the
 // listener so we must create a reference to it and call it in stopListeningForReconnect()
 let unsubscribeFromNetInfo;
-let unsubscribeFromSleepTimer;
 let unsubscribeFromAppState;
 let isOffline = false;
 let logInfo = () => {};
@@ -63,14 +61,6 @@ function listenForReconnect() {
         logInfo(`[NetworkConnection] NetInfo isConnected: ${state && state.isConnected}`);
         setOfflineStatus(!state.isConnected);
     });
-
-    // When a device is put to sleep, NetInfo is not always able to detect
-    // when connectivity has been lost. As a failsafe we will capture the time
-    // every two seconds and if the last time recorded goes past a threshold
-    // we know that the computer has been asleep.
-    unsubscribeFromSleepTimer = SleepTimer.addClockSkewListener(() => (
-        triggerReconnectionCallbacks('timer clock skewed')
-    ));
 }
 
 /**
@@ -82,10 +72,6 @@ function stopListeningForReconnect() {
         unsubscribeFromNetInfo();
         unsubscribeFromNetInfo = undefined;
     }
-    if (unsubscribeFromSleepTimer) {
-        unsubscribeFromSleepTimer();
-        unsubscribeFromSleepTimer = undefined;
-    }
     if (unsubscribeFromAppState) {
         unsubscribeFromAppState();
         unsubscribeFromAppState = undefined;