Revert "Bypass proxy on loopback IPs"

This reverts commit edb73c217d.

src/proxy.ts

@@ -25,11 +25,6 @@ export function checkBypass(reqUrl: URL): boolean {
     return false
   }
 
-  const reqHost = reqUrl.hostname
-  if (isLoopbackAddress(reqHost)) {
-    return true
-  }
-
   const noProxy = process.env['no_proxy'] || process.env['NO_PROXY'] || ''
   if (!noProxy) {
     return false
@@ -71,8 +66,3 @@ export function checkBypass(reqUrl: URL): boolean {
 
   return false
 }
-
-function isLoopbackAddress(host: string): boolean {
-  const hostUpper = host.toUpperCase()
-  return hostUpper === 'LOCALHOST' || hostUpper.startsWith('127.') || hostUpper.startsWith('::1')
-}