Revert "fix(api): fix subscription failures (#3998)"

This reverts commit 70f56f6.

Author: harsh62

AmplifyPlugins/Core/AWSPluginsCore/WebSocket/WebSocketClient.swift

@@ -248,13 +248,8 @@ extension WebSocketClient: URLSessionWebSocketDelegate {
 
         let nsError = error as NSError
         switch (nsError.domain, nsError.code) {
-        case (NSURLErrorDomain.self, NSURLErrorNetworkConnectionLost),
-             (NSURLErrorDomain.self, NSURLErrorCannotConnectToHost),
-             (NSURLErrorDomain.self, NSURLErrorTimedOut),
-             (NSURLErrorDomain.self, NSURLErrorNotConnectedToInternet),
-             (NSURLErrorDomain.self, NSURLErrorDataNotAllowed),
-             (NSPOSIXErrorDomain.self, Int(ECONNABORTED)),
-             (NSPOSIXErrorDomain.self, 57):
+        case (NSURLErrorDomain.self, NSURLErrorNetworkConnectionLost), // connection lost
+             (NSPOSIXErrorDomain.self, Int(ECONNABORTED)): // background to foreground
             self.subject.send(.error(WebSocketClient.Error.connectionLost))
             Task { [weak self] in
                 await self?.networkMonitor.updateState(.offline)
@@ -288,11 +283,11 @@ extension WebSocketClient {
         }
 
         switch stateChange {
-        case (.online, .offline), (.none, .offline), (.online, .none):
-            log.debug("[WebSocketClient] NetworkMonitor - Device went offline or network status became unknown")
+        case (.online, .offline):
+            log.debug("[WebSocketClient] NetworkMonitor - Device went offline")
             self.connection?.cancel(with: .invalid, reason: nil)
             self.subject.send(.disconnected(.invalid, nil))
-        case (.offline, .online), (.none, .online):
+        case (.offline, .online):
             log.debug("[WebSocketClient] NetworkMonitor - Device back online")
             await self.createConnectionAndRead()
         default:
@@ -340,19 +335,13 @@ extension WebSocketClient {
         }
 
         switch closeCode {
-        case .internalServerError,
-             .abnormalClosure,
-             .invalid,
-             .policyViolation:
-            log.debug("[WebSocketClient] Retrying on closeCode: \(closeCode)")
+        case .internalServerError:
             let delayInMs = await retryWithJitter.next()
             Task { [weak self] in
                 try await Task.sleep(nanoseconds: UInt64(delayInMs) * 1_000_000)
                 await self?.createConnectionAndRead()
             }
-        default:
-            log.debug("[WebSocketClient] Not retrying for closeCode: \(closeCode)")
-            break
+        default: break
         }
 
     }