bootctl: drop unnecessary verb_unlink()

It is a trivial wrapper for verb_list(). Let's directly use verb_list()
and drop verb_unlink().

Follow-up for 8702496bfb.

src/bootctl/bootctl-status.c

@@ -929,10 +929,6 @@ int verb_list(int argc, char *argv[], void *userdata) {
         }
 }
 
-int verb_unlink(int argc, char *argv[], void *userdata) {
-        return verb_list(argc, argv, userdata);
-}
-
 int vl_method_list_boot_entries(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata) {
         _cleanup_(boot_config_free) BootConfig config = BOOT_CONFIG_NULL;
         dev_t esp_devid = 0, xbootldr_devid = 0;

src/bootctl/bootctl-status.h

@@ -4,6 +4,5 @@
 
 int verb_status(int argc, char *argv[], void *userdata);
 int verb_list(int argc, char *argv[], void *userdata);
-int verb_unlink(int argc, char *argv[], void *userdata);
 
 int vl_method_list_boot_entries(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata);

src/bootctl/bootctl.c

@@ -682,7 +682,7 @@ static int bootctl_main(int argc, char *argv[]) {
                 { "kernel-identify",     2,        2,        0,            verb_kernel_identify     },
                 { "kernel-inspect",      2,        2,        0,            verb_kernel_inspect      },
                 { "list",                VERB_ANY, 1,        0,            verb_list                },
-                { "unlink",              2,        2,        0,            verb_unlink              },
+                { "unlink",              2,        2,        0,            verb_list                },
                 { "cleanup",             VERB_ANY, 1,        0,            verb_list                },
                 { "set-default",         2,        2,        0,            verb_set_efivar          },
                 { "set-oneshot",         2,        2,        0,            verb_set_efivar          },