Remove redundant std::byte StringMaker

Catch2 v3.4.0 already provides StringMaker<std::byte> specialization.

Author: claude

test/data_bits_test.cpp

@@ -1,18 +1,5 @@
 #include "mh/data/bits.hpp"
 #include <catch2/catch_all.hpp>
-#include <cstddef>
-#include <sstream>
-#include <iomanip>
-
-// Provide StringMaker for std::byte to allow Catch2 to print byte values
-template<>
-struct Catch::StringMaker<std::byte> {
-	static std::string convert(std::byte value) {
-		std::ostringstream oss;
-		oss << "0x" << std::hex << std::setfill('0') << std::setw(2) << static_cast<unsigned>(value);
-		return oss.str();
-	}
-};
 
 template<unsigned bits_to_copy, unsigned src_offset, typename TSrc = void, typename TDst = void>
 static void test_bit_functions(const TSrc* src, const TDst expected)