Context methods are non-static - accessed via interface

This is a move towards allowing multiple contexts - with the concept of a (possibly thread local) "current" context

include/catch.hpp

@@ -15,7 +15,6 @@
 #include "internal/catch_generators.hpp"
 #include "internal/catch_interfaces_exception.h"
 #include "internal/catch_approx.hpp"
-#include "internal/catch_test_case_info.hpp"
 #include "internal/catch_matchers.hpp"
 
 #ifdef __OBJC__