removed weird preprocessor juggling not needed

lib/setup.h

@@ -270,16 +270,6 @@ typedef int curl_socket_t;
 #define IOCTL_3_ARGS
 #endif
 
-#ifndef ECONNRESET
-#ifdef WSAECONNRESET
-#define ECONNRESET WSAECONNRESET
-#else
-/* This will effectively prevent the code from working in this particular
-   aspect, but it still compile fine! */
-#define ECONNRESET 10000
-#endif
-#endif
-
 #ifdef NETWARE
 #undef HAVE_ALARM
 #endif