[swift-evolution] [Pitch] Retiring `where` from for-in loops

[Brent Royal-Gordon]

> Also, we should think about removing `where` from `while` loops.
> We can copy `if` syntax to `while` conditions.

SE-0099 applies to all constructs which use condition clauses, including `while`. The "Detailed Design" section even specifically mentions the `while` grammar rule. <https://github.com/apple/swift-evolution/blob/master/proposals/0099-conditionclauses.md#detailed-design>

-- 
Brent Royal-Gordon
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