Clean out sharedlists (#14857)

changelog.md

@@ -191,6 +191,9 @@ proc mydiv(a, b): int {.raises: [].} =
 - Removed `asyncdispatch.newAsyncNativeSocket`, was deprecated since `0.18`.
 - Remove `dom.releaseEvents` and `dom.captureEvents`, was deprecated.
 
+- Remove `sharedlists.initSharedList`, was deprecated and produces undefined behaviour.
+
+
 ## Compiler changes
 
 - Specific warnings can now be turned into errors via `--warningAsError[X]:on|off`.

lib/pure/collections/sharedlist.nim

@@ -94,10 +94,4 @@ proc deinitSharedList*[A](t: var SharedList[A]) =
   clear(t)
   deinitLock t.lock
 
-proc initSharedList*[A](): SharedList[A] {.deprecated: "use 'init' instead".} =
-  ## This is not posix compliant, may introduce undefined behavior.
-  initLock result.lock
-  result.head = nil
-  result.tail = nil
-
 {.pop.}