docs universal: remove incorrect deprecated tag

The element references itself.

Probably a copypaste
https://github.com/userver-framework/userver/blob/574b400e40ee5e7cdbc633f2dbbc5f69680ffe60/universal/include/userver/utils/meta_light.hpp#L99-L103

Tests: протестировано CI

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Pull Request resolved: #1207
commit_hash:74e2929d8949f7f5d7e9625052446f71e62bc71d

Author: ddvamp

universal/include/userver/utils/meta_light.hpp

@@ -75,7 +75,6 @@ template <typename T, template <typename...> typename Template>
 concept IsInstantiationOf = impl::IsInstantiationOf<Template, T>::value;
 
 /// @brief Returns `true` if the type (with remove cv-qualifiers) is an instantiation of the specified template.
-/// @deprecated Use @ref meta::IsCvInstantiationOf instead.
 template <typename T, template <typename...> typename Template>
 concept IsCvInstantiationOf = IsInstantiationOf<std::remove_cv_t<T>, Template>;