gh-137928: remove redundant size validation in multiprocessing.heap (GH-137929)

remove redundant size check, malloc does it

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Co-authored-by: Gregory P. Smith <greg@krypto.org>

Lib/multiprocessing/heap.py

@@ -324,10 +324,6 @@ class BufferWrapper(object):
     _heap = Heap()
 
     def __init__(self, size):
-        if size < 0:
-            raise ValueError("Size {0:n} out of range".format(size))
-        if sys.maxsize <= size:
-            raise OverflowError("Size {0:n} too large".format(size))
         block = BufferWrapper._heap.malloc(size)
         self._state = (block, size)
         util.Finalize(self, BufferWrapper._heap.free, args=(block,))