Remove 'ENABLE_VIRTUAL_TERMINAL_INPUT' : undeclared identifier

Not defined in MSVC2013.
Appears to work again/still.

src/sbbs3/jsexec.c

@@ -171,8 +171,7 @@ cooked_tty(void)
 #elif defined _WIN32
 		SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), ENABLE_ECHO_INPUT
 		    | ENABLE_EXTENDED_FLAGS | ENABLE_INSERT_MODE | ENABLE_LINE_INPUT
-		    | ENABLE_MOUSE_INPUT | ENABLE_PROCESSED_INPUT | ENABLE_QUICK_EDIT_MODE
-		    | ENABLE_VIRTUAL_TERMINAL_INPUT);
+		    | ENABLE_MOUSE_INPUT | ENABLE_PROCESSED_INPUT | ENABLE_QUICK_EDIT_MODE);
 #else
 		#warning Can't cook the tty on this platform
 #endif