Explain or remove mystery import in Unsafe.Coerce

Unsafe.Coerce has the line

import GHC.Integer () -- for build ordering

It is not at all clear to me why build ordering demands that GHC.Integer be compiled before Unsafe.Coerce when the latter uses no numeric literals, no arithmetic, and no numeric types. If there's a real reason for this, the comment should be expanded. Otherwise, the import should be removed.

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Trac field	Value
Version	8.4.3
Type	Task
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Core Libraries
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