[clang-tools-extra] [NFC] Complete proper copying and resource cleanup in classes. (PR #118655)

[Aaron Ballman via cfe-commits]

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@@ -31,6 +31,8 @@ class NoLintDirectiveHandler {
 public:
   NoLintDirectiveHandler();
   ~NoLintDirectiveHandler();
+  NoLintDirectiveHandler(const NoLintDirectiveHandler &) = default;
+  NoLintDirectiveHandler &operator=(const NoLintDirectiveHandler &) = default;
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AaronBallman wrote:

I don't think these are strictly needed, but I think it would be fine to explicitly `= delete` them.

https://github.com/llvm/llvm-project/pull/118655