Normative: remove Symbol.species from InitializeTypedArrayFromTypedArray

Closes tc39#2677

spec.html

@@ -39502,15 +39502,11 @@ <h1>
             1. Let _srcByteOffset_ be _srcArray_.[[ByteOffset]].
             1. Let _elementLength_ be _srcArray_.[[ArrayLength]].
             1. Let _byteLength_ be _elementSize_ &times; _elementLength_.
-            1. If IsSharedArrayBuffer(_srcData_) is *false*, then
-              1. Let _bufferConstructor_ be ? SpeciesConstructor(_srcData_, %ArrayBuffer%).
-            1. Else,
-              1. Let _bufferConstructor_ be %ArrayBuffer%.
             1. If _elementType_ is the same as _srcType_, then
-              1. Let _data_ be ? CloneArrayBuffer(_srcData_, _srcByteOffset_, _byteLength_, _bufferConstructor_).
+              1. Let _data_ be ? CloneArrayBuffer(_srcData_, _srcByteOffset_, _byteLength_, %ArrayBuffer%).
             1. Else,
-              1. Let _data_ be ? AllocateArrayBuffer(_bufferConstructor_, _byteLength_).
-              1. If IsDetachedBuffer(_srcData_) is *true*, throw a *TypeError* exception.
+              1. Let _data_ be ? AllocateArrayBuffer(%ArrayBuffer%, _byteLength_).
+              1. Assert: IsDetachedBuffer(_srcData_) is *false*.
               1. If _srcArray_.[[ContentType]] &ne; _O_.[[ContentType]], throw a *TypeError* exception.
               1. Let _srcByteIndex_ be _srcByteOffset_.
               1. Let _targetByteIndex_ be 0.