refactor: unused `SameReference` concept removed #1990

Job	Run time
Generate build matrix for Conan CI	3s
Apple Clang 15 C++20 fmtlib gsl-lite Debug	2h 18m 48s
Apple Clang 15 C++20 fmtlib none Release	2h 9m 14s
Clang-16 (x86-64) C++20 fmtlib gsl-lite Debug	5m 46s
Clang-16 (x86-64) C++20 fmtlib none Release	5m 36s
Clang-17 (x86-64) C++20 fmtlib none Debug	6m 39s
Clang-17 (x86-64) C++20 std::format gsl-lite Debug	6m 51s
Clang-18 (arm64) C++20 std::format gsl-lite Debug	3m 12s
Clang-18 (arm64) C++23 fmtlib none Release	3m 22s
Clang-18 (x86-64) C++20 std::format gsl-lite Debug	6m 53s
Clang-18 (x86-64) C++23 std::format none Debug	6m 45s
GCC-12 C++20 fmtlib gsl-lite Debug	4m 57s
GCC-12 C++20 fmtlib ms-gsl Release	4m 47s
GCC-12 C++23 fmtlib ms-gsl Debug	5m 5s
GCC-13 C++20 std::format gsl-lite Debug	4m 22s
GCC-13 C++20 std::format none Release	4m 26s
GCC-14 C++20 fmtlib none Release	4m 52s
GCC-14 C++20 std::format gsl-lite Debug	3m 39s
MSVC 14.4 C++20 fmtlib gsl-lite Debug	1m 45s
MSVC 14.4 C++20 std::format gsl-lite Debug	1m 51s
Promote Conan package	2m 19s
	5h 51m 12s

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