Apply requested changes.

Author: MohammedKHC

okio/src/jsMain/kotlin/okio/JsPlatform.kt

@@ -54,13 +54,9 @@ private val path: dynamic
 internal val tmpdir: String
   get() = os?.tmpdir() as? String ?: "/tmp"
 
-actual class Lock {
-  companion object {
-    val instance = Lock()
-  }
-}
+actual typealias Lock = Unit
 
-internal actual fun newLock(): Lock = Lock.instance
+internal actual fun newLock(): Lock = Unit
 
 actual inline fun <T> Lock.withLock(action: () -> T): T {
   contract {

okio/src/unixMain/kotlin/okio/UnixPlatform.kt

@@ -23,7 +23,12 @@ import kotlinx.cinterop.alloc
 import kotlinx.cinterop.free
 import kotlinx.cinterop.nativeHeap
 import kotlinx.cinterop.ptr
-import platform.posix.*
+import platform.posix.errno
+import platform.posix.pthread_mutex_destroy
+import platform.posix.pthread_mutex_init
+import platform.posix.pthread_mutex_lock
+import platform.posix.pthread_mutex_t
+import platform.posix.pthread_mutex_unlock
 
 actual class Lock {
   val mutex = nativeHeap.alloc<pthread_mutex_t>().apply {

okio/src/wasmMain/kotlin/okio/WasmPlatform.kt

@@ -22,13 +22,9 @@ import kotlin.contracts.contract
 internal actual val PLATFORM_DIRECTORY_SEPARATOR: String
   get() = "/"
 
-actual class Lock {
-  companion object {
-    val instance = Lock()
-  }
-}
+actual typealias Lock = Unit
 
-internal actual fun newLock(): Lock = Lock.instance
+internal actual fun newLock(): Lock = Unit
 
 @OptIn(ExperimentalContracts::class)
 actual inline fun <T> Lock.withLock(action: () -> T): T {