remove cache in ios and web

ios/ExampleiOSApp/TTSViewModel.swift

@@ -1,76 +0,0 @@
-import Foundation
-import AVFoundation
-
-@MainActor
-final class TTSViewModel: ObservableObject {
-    @Published var text: String = "This morning, I took a walk in the park, and the sound of the birds and the breeze was so pleasant that I stopped for a long time just to listen."
-    @Published var nfe: Double = 5
-    @Published var voice: TTSService.Voice = .male
-    @Published var isGenerating: Bool = false
-    @Published var isPlaying: Bool = false
-    @Published var errorMessage: String?
-    @Published var audioURL: URL?
-
-    @Published var elapsedSeconds: Double?
-    @Published var audioSeconds: Double?
-
-    private var service: TTSService?
-    private var player = AudioPlayer()
-
-    var rtfText: String? {
-        guard let e = elapsedSeconds, let a = audioSeconds, a > 0 else { return nil }
-        let rtf = e / a
-        return String(format: "RTF %.2fx · %.2fs / %.2fs", rtf, e, a)
-    }
-
-    func startup() {
-        do {
-            service = try TTSService()
-            Task { await self.service?.warmup(nfe: 5) }
-        } catch {
-            errorMessage = "Failed to init TTS: \(error.localizedDescription)"
-        }
-    }
-
-    func generate() {
-        guard let service = service else { return }
-        isGenerating = true
-        errorMessage = nil
-        audioURL = nil
-        elapsedSeconds = nil
-        audioSeconds = nil
-        Task {
-            do {
-                let result = try await service.synthesize(text: text, nfe: Int(nfe), voice: voice)
-                await MainActor.run {
-                    self.audioURL = result.url
-                    self.elapsedSeconds = result.elapsedSeconds
-                    self.audioSeconds = result.audioSeconds
-                    self.isGenerating = false
-                }
-                self.play(url: result.url)
-            } catch {
-                await MainActor.run {
-                    self.errorMessage = error.localizedDescription
-                    self.isGenerating = false
-                }
-            }
-        }
-    }
-
-    func togglePlay() {
-        if isPlaying {
-            player.stop()
-            isPlaying = false
-        } else if let url = audioURL {
-            play(url: url)
-        }
-    }
-
-    private func play(url: URL) {
-        player.play(url: url) { [weak self] in
-            DispatchQueue.main.async { self?.isPlaying = false }
-        }
-        isPlaying = true
-    }
-}