Remove obsolete WebSocket logs monitor (#5629)

This never worked in prod (see #1460)

core/server/monitor.js

@@ -1,20 +1,7 @@
 'use strict'
 
 const config = require('config').util.toObject()
-const secretIsValid = require('./secret-is-valid')
 const RateLimit = require('./rate-limit')
-const log = require('./log')
-
-function secretInvalid(req, res) {
-  if (!secretIsValid(req.password)) {
-    // An unknown entity tries to connect. Let the connection linger for a minute.
-    setTimeout(() => {
-      res.json({ errors: [{ code: 'invalid_secrets' }] })
-    }, 10000)
-    return true
-  }
-  return false
-}
 
 function setRoutes({ rateLimit }, { server, metricInstance }) {
   const ipRateLimit = new RateLimit({
@@ -29,12 +16,6 @@ function setRoutes({ rateLimit }, { server, metricInstance }) {
   })
 
   server.handle((req, res, next) => {
-    if (req.url.startsWith('/sys/')) {
-      if (secretInvalid(req, res)) {
-        return
-      }
-    }
-
     if (rateLimit) {
       const ip =
         (req.headers['x-forwarded-for'] || '').split(', ')[0] ||
@@ -63,23 +44,6 @@ function setRoutes({ rateLimit }, { server, metricInstance }) {
     res.json({ ips: config.public.shields_ips })
   })
 
-  server.ws('/sys/logs', socket => {
-    const listener = (...msg) => socket.send(msg.join(' '))
-    socket.on('close', () => log.removeListener(listener))
-    socket.on('message', msg => {
-      let req
-      try {
-        req = JSON.parse(msg)
-      } catch (e) {
-        return
-      }
-      if (!secretIsValid(req.secret)) {
-        return socket.close()
-      }
-      log.addListener(listener)
-    })
-  })
-
   server.get('/sys/rate-limit', (req, res) => {
     res.json({
       ip: ipRateLimit.toJSON(),
@@ -95,6 +59,4 @@ function setRoutes({ rateLimit }, { server, metricInstance }) {
   }
 }
 
-module.exports = {
-  setRoutes,
-}
+module.exports = { setRoutes }