tree-wide: drop socket.h when socket-util.h is included

src/libsystemd-network/dhcp-network.c

@@ -9,7 +9,6 @@
 #include <net/if_arp.h>
 #include <stdio.h>
 #include <string.h>
-#include <sys/socket.h>
 #include <linux/filter.h>
 #include <linux/if_infiniband.h>
 #include <linux/if_packet.h>

src/libsystemd-network/dhcp6-network.c

@@ -8,7 +8,6 @@
 #include <netinet/ip6.h>
 #include <stdio.h>
 #include <string.h>
-#include <sys/socket.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <linux/if_packet.h>

src/libsystemd-network/icmp6-util.c

@@ -9,7 +9,6 @@
 #include <netinet/ip6.h>
 #include <stdio.h>
 #include <string.h>
-#include <sys/socket.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <net/if.h>

src/libsystemd-network/test-dhcp6-client.c

@@ -7,7 +7,6 @@
 #include <net/if_arp.h>
 #include <stdbool.h>
 #include <stdio.h>
-#include <sys/socket.h>
 #include <sys/types.h>
 #include <unistd.h>
 

src/libsystemd-network/test-ipv4ll.c

@@ -7,7 +7,6 @@
 #include <netinet/if_ether.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/socket.h>
 #include <sys/types.h>
 #include <unistd.h>