Remove in-app sponsor

app/src/main/java/io/nekohasekai/sfa/bg/BoxService.kt

@@ -21,7 +21,6 @@ import io.nekohasekai.libbox.Libbox
 import io.nekohasekai.libbox.PlatformInterface
 import io.nekohasekai.libbox.SystemProxyStatus
 import io.nekohasekai.sfa.Application
-import io.nekohasekai.sfa.BuildConfig
 import io.nekohasekai.sfa.R
 import io.nekohasekai.sfa.constant.Action
 import io.nekohasekai.sfa.constant.Alert
@@ -53,9 +52,7 @@ class BoxService(
             val tempDir = Application.application.cacheDir
             tempDir.mkdirs()
             Libbox.setup(baseDir.path, workingDir.path, tempDir.path, false)
-            if (!BuildConfig.DEBUG) {
-                Libbox.redirectStderr(File(workingDir, "stderr.log").path)
-            }
+            Libbox.redirectStderr(File(workingDir, "stderr.log").path)
             initializeOnce = true
             return
         }

app/src/main/java/io/nekohasekai/sfa/ui/MainActivity.kt

@@ -81,8 +81,6 @@ class MainActivity : AbstractActivity(), ServiceConnection.Callback {
         startIntegration()
 
         onNewIntent(intent)
-
-        Vendor.initializeBillingClient(this)
     }
 
     override fun onNewIntent(intent: Intent) {

app/src/main/java/io/nekohasekai/sfa/ui/main/SettingsFragment.kt

@@ -104,9 +104,7 @@ class SettingsFragment : Fragment() {
             startActivity(Intent(requireContext(), DebugActivity::class.java))
         }
         binding.startSponserButton.setOnClickListener {
-            Vendor.startSponsor(requireActivity()) {
-                activity.launchCustomTab("https://sekai.icu/sponsor/")
-            }
+            activity.launchCustomTab("https://sekai.icu/sponsors/")
         }
         lifecycleScope.launch(Dispatchers.IO) {
             reloadSettings()

app/src/main/java/io/nekohasekai/sfa/vendor/VendorInterface.kt

@@ -5,6 +5,4 @@ import android.app.Activity
 interface VendorInterface {
     fun checkUpdateAvailable(): Boolean
     fun checkUpdate(activity: Activity, byUser: Boolean)
-    fun initializeBillingClient(activity: Activity)
-    fun startSponsor(activity: Activity, fallback: () -> Unit)
 }