This rule is meant to be used as a way to track code which is marked as being deprecated. Deprecated code should eventually be removed.
Noncompliant code example
// C++14 attribute
[[deprecated]] // Noncompliant
void fun();
// GNU attribute
__attribute__((deprecated)) // Noncompliant
void fun();
// Microsoft attribute
__declspec(deprecated) // Noncompliant
void fun();
