moving exception include

include/gsl/gsl_assert

@@ -17,8 +17,6 @@
 #ifndef GSL_CONTRACTS_H
 #define GSL_CONTRACTS_H
 
-#include <exception>
-
 //
 // make suppress attributes parse for some compilers
 // Hopefully temporary until suppression standardization occurs
@@ -47,6 +45,10 @@
 #pragma clang diagnostic ignored "-Winvalid-noreturn"
 #endif
 
+#else
+
+#include <exception>
+
 #endif
 
 #define GSL_STRINGIFY_DETAIL(x) #x
@@ -110,14 +112,6 @@ namespace details
 #endif
     }
 
-    template <typename Exception>
-    [[deprecated("GSL no longer supports throwing for contract violations. Use gsl::details::terminate() instead.")]]
-    [[noreturn]] void throw_exception(Exception&&) noexcept
-    {
-        gsl::details::terminate();
-    }
-
-
 } // namespace details
 } // namespace gsl