[core] Remove workaround for rt-info tests (#32721)

### Details:
 - Edit remove WA as is not required any more.

### Tickets:
 - CVS-174684

Signed-off-by: Raasz, Pawel <[email protected]>

Author: praasz

src/frontends/ir/tests/rt_info_custom.cpp

@@ -10,26 +10,7 @@
 #include "openvino/op/abs.hpp"
 #include "openvino/pass/serialize.hpp"
 #include "openvino/runtime/core.hpp"
-
-#define XML_UTIL_LINKAGE_WORKAROUND
-/*
-    There is an issue with doubled definition of stringstream on MSVC 14.44 (VS 17 2022):
-    openvinod.lib(openvinod.dll) : error LNK2005: "protected: __cdecl std::basic_streambuf<char,struct
-    std::char_traits<char> >::basic_streambuf<char,struct std::char_traits<ch ar> >(void)"
-    (??0?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAA@XZ) already defined in frontend_test_basic.obj
-    [D:\ov\build\src\frontends\ir\tests\ov_ir_frontend_tests .vcxproj]
-    It's not certain whether it's OV or MS problem, thus the workaround.
-*/
-#ifdef XML_UTIL_LINKAGE_WORKAROUND
-namespace ov::util {
-OPENVINO_API std::string rt_info_get_user_name(const std::string& custom_name);
-OPENVINO_API Any& rt_info_get_user_data(AnyMap& rt_map, const std::string& custom_name);
-OPENVINO_API const Any& rt_info_get_user_data(const AnyMap& rt_map, const std::string& custom_name);
-OPENVINO_API void rt_info_set_user_data(AnyMap& rt_map, const std::string& custom_name, const Any& value);
-}  // namespace ov::util
-#else
-#    include "openvino/xml_util/xml_serialize_util.hpp"
-#endif
+#include "openvino/xml_util/xml_serialize_util.hpp"
 
 namespace ov::test {