Remove zstd_support_multithread from __all__

Author: emmatyping

Lib/compression/zstd/__init__.py

@@ -11,7 +11,6 @@
     "get_frame_info",
     "Strategy",
     "train_dict",
-    "zstd_support_multithread",
 
     # compression.zstd._zstdfile
     "open",