tree-wide: Remove dead code

This code seems to not be used anywhere at all, so let's drop it.

Follow up for ba8d00e859
Follow up for 85686b37b0
Follow up for aff853f8ea
Follow up for 36dad381a2

src/basic/ether-addr-util.c

@@ -86,22 +86,6 @@ char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR
         return buffer;
 }
 
-int ether_addr_to_string_alloc(const struct ether_addr *addr, char **ret) {
-        char *buf;
-
-        assert(addr);
-        assert(ret);
-
-        buf = new(char, ETHER_ADDR_TO_STRING_MAX);
-        if (!buf)
-                return -ENOMEM;
-
-        ether_addr_to_string(addr, buf);
-
-        *ret = buf;
-        return 0;
-}
-
 int ether_addr_compare(const struct ether_addr *a, const struct ether_addr *b) {
         return memcmp(a, b, ETH_ALEN);
 }