Revert "Try adding express's ip address"

This reverts commit 0568556.

backend/api/src/app.ts

@@ -215,20 +215,12 @@ const ignoredEndpoints = [
   '/get-channel-seen-time',
 ]
 
-const getCleanIp = (ip: string) => {
-  return ip.startsWith('::ffff:') ? ip.substring(7) : ip
-}
-
 const requestMonitoring: RequestHandler = (req, res, next) => {
   const traceContext = req.get('X-Cloud-Trace-Context')
   const traceId = traceContext ? traceContext.split('/')[0] : randomString(12)
   const { method, path: endpoint, url } = req
   const baseEndpoint = getBaseName(endpoint)
-
-  // Get clean IP address
-  const ip = getCleanIp(req.ip)
-
-  const context = { endpoint, traceId, baseEndpoint, ip }
+  const context = { endpoint, traceId, baseEndpoint }
   withMonitoringContext(context, () => {
     if (method == 'OPTIONS') {
       next()
@@ -242,7 +234,7 @@ const requestMonitoring: RequestHandler = (req, res, next) => {
     ) {
       log(`${method} ${url}`)
     }
-    metrics.inc('http/request_count', { endpoint, baseEndpoint, method, ip })
+    metrics.inc('http/request_count', { endpoint, baseEndpoint, method })
     res.on('close', () => {
       const endTs = hrtime.bigint()
       const latencyMs = Number(endTs - startTs) / 1e6 // Convert to milliseconds