Cleanup includes in catch_list.cpp

src/catch2/internal/catch_list.cpp

@@ -14,9 +14,7 @@
 
 #include <catch2/internal/catch_context.hpp>
 #include <catch2/catch_config.hpp>
-#include <catch2/internal/catch_stream.hpp>
-#include <catch2/internal/catch_test_spec_parser.hpp>
-#include <catch2/internal/catch_string_manip.hpp>
+#include <catch2/catch_test_spec.hpp>
 #include <catch2/catch_test_case_info.hpp>
 
 namespace Catch {