Refactored last usages of old tag parser and removed all the, now redundant, tag parsing code

include/internal/catch_impl.hpp

@@ -25,7 +25,6 @@
 #include "catch_assertionresult.hpp"
 #include "catch_expressionresult_builder.hpp"
 #include "catch_test_case_info.hpp"
-#include "catch_tags.hpp"
 #include "catch_test_spec.hpp"
 #include "catch_version.hpp"
 #include "catch_message.hpp"