Remove freeze usage (#1444)

The old memory model was removed in 1.9.20.

zipline-loader/src/nativeMain/kotlin/app/cash/zipline/loader/URLSessionZiplineHttpClient.kt

@@ -17,8 +17,6 @@ package app.cash.zipline.loader
 
 import kotlin.coroutines.resume
 import kotlin.coroutines.resumeWithException
-import kotlin.experimental.ExperimentalNativeApi
-import kotlin.native.concurrent.freeze
 import kotlinx.coroutines.CancellableContinuation
 import kotlinx.coroutines.suspendCancellableCoroutine
 import okio.ByteString
@@ -37,10 +35,6 @@ import platform.Foundation.dataTaskWithRequest
 internal class URLSessionZiplineHttpClient(
  private val urlSession: NSURLSession,
 ) : ZiplineHttpClient() {
- init {
- maybeFreeze()
- }
-
  override suspend fun download(
  url: String,
  requestHeaders: List<Pair<String, String>>,
@@ -55,7 +49,7 @@ internal class URLSessionZiplineHttpClient(
  addValue(value = value, forHTTPHeaderField = name)
  }
  },
- completionHandler = completionHandler::invoke.maybeFreeze(),
+ completionHandler = completionHandler::invoke,
  )
 
  continuation.invokeOnCancellation {
@@ -92,13 +86,3 @@ private class CompletionHandler(
  continuation.resume(data.toByteString())
  }
 }
-
-/** Freeze this when executing on Kotlin/Native's strict memory model. */
-@OptIn(ExperimentalNativeApi::class)
-private fun <T> T.maybeFreeze(): T {
- return if (Platform.memoryModel == MemoryModel.STRICT) {
- this.freeze()
- } else {
- this
- }
-}