[clang] [clang-format][NFC] Simplify AlignMacroMatches (PR #164122)

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@@ -656,7 +656,6 @@ void WhitespaceManager::alignConsecutiveMacros() {
 
   auto AlignMacrosMatches = [](const Change &C) {
     const FormatToken *Current = C.Tok;
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owenca wrote:

We should `assert(Current)` here.

https://github.com/llvm/llvm-project/pull/164122