[clang-tidy] modernize-use-equals-delete (#5718)

script/make-pretty

@@ -117,6 +117,7 @@ readonly OT_CLANG_TIDY_BUILD_OPTS=(
 readonly OT_CLANG_TIDY_CHECKS="\
 -*,\
 modernize-use-bool-literals,\
+modernize-use-equals-delete,\
 modernize-use-nullptr,\
 readability-make-member-function-const,\
 readability-simplify-boolean-expr,\

src/core/common/non_copyable.hpp

@@ -42,12 +42,12 @@ namespace ot {
  */
 class NonCopyable
 {
+public:
+    NonCopyable(const NonCopyable &) = delete;
+    NonCopyable &operator=(const NonCopyable &) = delete;
+
 protected:
     NonCopyable(void) {}
-
-private:
-    NonCopyable(const NonCopyable &);
-    NonCopyable &operator=(const NonCopyable &);
 };
 
 } // namespace ot