std: dragonfly: fix duplicate definition of sockaddr_storage

Author: andrewrk

lib/std/os/bits/dragonfly.zig

@@ -645,13 +645,6 @@ pub const AF_MAX = 36;
 
 pub const sa_family_t = u8;
 pub const socklen_t = c_uint;
-pub const sockaddr_storage = extern struct {
-    ss_len: u8,
-    ss_family: sa_family_t,
-    __ss_pad1: [5]u8,
-    __ss_align: i64,
-    __ss_pad2: [112]u8,
-};
 pub const dl_phdr_info = extern struct {
     dlpi_addr: usize,
     dlpi_name: ?[*:0]const u8,