Remove old unused AI_V4MAPPED flag to getaddrinfo

(cherry picked from commit de23ce11b51847b7b8bfc10ecf5926827516ac5a)

drivers/unix/ip_unix.cpp

@@ -37,9 +37,6 @@
   #ifndef AI_ADDRCONFIG
     #define AI_ADDRCONFIG 0x00000400
   #endif
-  #ifndef AI_V4MAPPED
-    #define AI_V4MAPPED 0x00000800
-  #endif
  #ifdef WINRT_ENABLED
   #include <ws2tcpip.h>
   #include <winsock2.h>
@@ -97,12 +94,7 @@ IP_Address IP_Unix::_resolve_hostname(const String& p_hostname, Type p_type) {
 		hints.ai_flags = 0;
 	} else {
 		hints.ai_family = AF_UNSPEC;
-#ifdef ANDROID_ENABLED
-		// AI_V4MAPPED is not supported by android getaadrinfo
 		hints.ai_flags = AI_ADDRCONFIG;
-#else
-		hints.ai_flags = (AI_V4MAPPED | AI_ADDRCONFIG);
-#endif
 	};
 
 	int s = getaddrinfo(p_hostname.utf8().get_data(), NULL, &hints, &result);