[llvm] [NFC][Target][MC] Fixed rule-of-three for MCFragment/Archive/RegisterTargetPassConfigCallback classes (PR #193470)

[Fangrui Song via llvm-commits]

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@@ -173,6 +173,7 @@ class MCFragment {
                       bool HasInstructions = false);
   MCFragment(const MCFragment &) = delete;
   MCFragment &operator=(const MCFragment &) = delete;
+  ~MCFragment() = default;
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MaskRay wrote:

Drop. the implicit destructor is already trivial

https://github.com/llvm/llvm-project/pull/193470